SIM Cards, eSIMs & Internet

One of the reasons Chiang Mai became a global hub for remote workers is embarrassingly simple: the internet is fast, cheap, and everywhere. You can land at the airport, have a working SIM before you reach baggage claim, sign up for gigabit fibre in your condo within a week, and choose from dozens of coworking spaces and laptop-friendly cafés. This section covers all four things you'll actually need — a mobile SIM, home fibre, somewhere to work, and a realistic picture of reliability — with current prices in Thai baht and a dollar equivalent at the wiki's working rate (shown in the header; see Cost of Living for how it's set).

Mobile SIM cards#

Thailand has three big networks: AIS, TrueMove H (which absorbed the old dtac in the 2023 merger), and NT (the state operator, mostly ignored by expats). For almost everyone the choice comes down to AIS versus True. AIS is generally reckoned to have the widest and fastest coverage — it was named Thailand's fastest network in the 2025 Speedtest awards and covers well over 95% of the population with 4G/5G, including most of the rural areas around Chiang Mai. True is very close and often a touch cheaper, with strong coverage in the city and modern condo areas. In practice both are excellent inside Chiang Mai; if you plan to spend time in the hills or on motorbike trips into the countryside (see Day Trips), AIS has a slight edge, which is why it's the default many long-stayers land on.

Tourist SIMs (your first few weeks)#

If you're newly arrived, just grab a tourist SIM. They're sold at the airport, in every 7-Eleven, and at network shops in the malls. You'll need your passport to register — this is a legal requirement under NBTC rules, takes ten minutes, and there's a limit of three SIMs per person per network.

A 2026 rule change worth knowing: as of mid-2026 Thailand now requires real-time biometric "liveness" verification at the point of SIM registration for both prepaid and postpaid — a tightening published in the Government Gazette (the NBTC's anti-tech-crime measures, effective ~16 May 2026, building on the August 2025 rules). In practice, when you register a SIM the staff member (or the app) will snap a live photo and may ask you to blink or turn your head so the system can confirm you're a real person and not a photo. It's a quick, anti-fraud step aimed at the scam-SIM epidemic — nothing sinister, but it does mean fully remote sign-ups are largely gone; expect to register in person at a 7-Eleven, an operator branch or an authorised dealer, passport in hand. It also means a friend can't easily register a SIM "for" you before you land.

• AIS Traveller / True Tourist SIM — unlimited-data packages running 5 to 30 days. Airport pricing for a 30-day unlimited plan is around ฿1,199 ($35), but you'll pay noticeably less buying the same or a similar plan in a 7-Eleven or network shop in town, where cheaper tiers start around ฿150–300 ($4–9). A useful thing to know: "unlimited" plans have a high-speed data allowance and then throttle (typically to ~384Kbps) once you pass it, though for a month of ordinary use most people never notice.
• Note: tourist SIMs used beyond ~60 days from activation now require you to re-confirm your passport identity (via SMS to 4444161 or at any network shop), a recent anti-fraud rule.

eSIM — the fastest way to arrive connected#

If your phone supports eSIM, you can be online the moment you land without swapping anything physical. There are two routes:

• Travel eSIMs (Airalo, Holafly, Yesim, Saily, Nomad, etc.) — bought and installed from your home country before you fly. These run on the AIS or True networks under the hood, cost roughly $13–22 for 30 days (they're priced in dollars), and usually carry a daily fair-use cap (2–3GB at full speed) before soft throttling. Perfect for the first week; they're data-only and don't give you a Thai phone number.
• Operator eSIMs — both AIS and True sell eSIM versions of their tourist and postpaid plans, so once you're here you can add a genuine Thai number without a physical SIM. This is the better long-term option because a local number is what LINE, banks, delivery apps and PromptPay expect (see Money & Banking and Essential Apps).

A common setup for arrivals: keep your home SIM in the physical slot for banking texts, and run a Thai eSIM alongside it.

Monthly plans once you settle#

Once you have a longer-term visa (and ideally a Thai address or bank account), a postpaid monthly plan is cheaper per gigabyte and renews automatically. Rough current pricing:

• AIS / True postpaid: around ฿599 ($18)/month for ~30GB of 5G, up to roughly ฿1,099–1,199 ($32–35)/month for genuinely unlimited data. True often bundles streaming (TrueVisions, etc.).
• Budget tiers can dip to ~฿499 ($15)/month but with tighter caps.

To sign up for postpaid you'll typically need your passport plus a long-term visa or work permit, and sometimes a Thai credit/debit card. If you're on a tourist visa or DTV and can't do postpaid yet (see Visas & Visa Agents), don't worry — just keep a prepaid SIM and buy a monthly "unlimited" add-on in the app or at any 7-Eleven. This is what most nomads use and it works exactly the same day to day; you simply top up each month instead of being billed. Switching to postpaid later is easy once your visa and paperwork are sorted.

Home internet (fibre)#

If you're renting anything longer than a month (see Where to Live), get your own fibre line — it's cheap and far more reliable than leaning on shared condo WiFi or a mobile hotspot for video calls. The main providers are AIS Fibre (merged with 3BB into "Fibre3"), True Online, and 3BB. Coverage across Chiang Mai is good: True tends to be strongest in Nimman and newer condo developments, while AIS-3BB Fibre3 blankets most residential areas.

Representative 2026 plan pricing (promotions shift monthly, so treat these as a guide):

• AIS Fibre3: roughly 200/200 Mbps at ฿599 ($18)/month, 500/500 Mbps at ฿799 ($24)/month, 1000/500 Mbps around ฿1,099 ($32)/month, and symmetric 1000/1000 Mbps near ฿1,299 ($38)/month. Post-merger promos like 500/500 Mbps for ฿499/month with free installation appear regularly.
• True Online: around 200/100 Mbps for ฿499 ($15)/month, 500/200 Mbps for ฿699 ($21)/month, and 1000/500 Mbps for ฿899 ($27)/month.
• 3BB is often the value pick at ฿499–999 ($15–29)/month.

Most people find a ฿599–799 ($18–24)/month, 300–500 Mbps plan is far more than enough for calls, streaming and cloud work.

• Installation: usually free on promotion, otherwise ฿500–2,000 ($15–59). Some plans list a larger (~฿4,800) install fee that's waived if you commit to a 24-month contract — read the term before signing, especially if you might move. A technician normally comes within 2–5 business days and setup takes about an hour.
• Practical tips: many condos already have a provider wired in or an exclusive building deal — ask the juristic/management office first, since that's often the fastest route. Contracts and bills are in Thai; your landlord or agent can help you sign up, and you can pay monthly via app, 7-Eleven, or bank transfer. Lines are tied to an address, not to you, so factor a fresh install into any move (more in Setting Up Home).

5G home broadband — a fibre alternative for renters and movers#

If you're in a short-term rental, a building where fibre installation is stalled, or you just don't want to sign a 12–24-month contract before you know where you'll settle, both AIS and True now sell a genuine fibre alternative: a 5G fixed-wireless (FWA) home router. You take a small SIM-based router home, plug it in, and it turns the mobile 5G network into home WiFi — no technician visit, no drilling, no waiting days for an installer.

• How it works: the router sits near a window (signal strength matters more than with fibre), takes a SIM or eSIM, and broadcasts WiFi to your devices exactly like a normal home router. True markets this explicitly at renters, students and buildings where fixed fibre isn't yet run.
• Speed: genuinely fibre-like in good coverage — AIS's mmWave 5G is rated up to 2Gbps in ideal conditions, and True advertises up to 1Gbps on its 5G Home packages. Real-world speed depends heavily on how close you are to a mast and how many walls are between you and the window; ask the shop to check coverage at your specific address (both carriers can look this up by ID/postcode) before committing.
• Price: sits in the same broad band as entry-to-mid fibre plans, with router rental sometimes bundled into the package (AIS lists a ~฿2,500 router value as part of some broadband bundles) — but exact current tariffs move often enough that it's worth checking the AIS/True apps or a shop directly rather than trusting a printed number.
• Who it suits: short-stayers, people mid-move between condos, anyone in a new development where fibre hasn't been trenched yet, and digital nomads who don't want a long contract. Who it doesn't suit: anyone needing rock-solid uptime for client calls in a weak-signal building — a wired fibre line is still the safer bet if your income depends on never dropping a call.
• Practical tip: because it's just a SIM in a router, you can test it risk-free with a prepaid data SIM in a spare phone or a cheap 4G/5G router before committing to a monthly 5G Home plan, to confirm the signal at your specific address is strong enough.

Mesh WiFi — fixing dead zones in older buildings & houses#

Thailand's residential buildings are heavy on reinforced concrete, and older Chiang Mai houses and shophouses often have thick block walls between rooms — great for keeping the heat out, terrible for a single router's WiFi signal. If you've got a dead zone in a back bedroom, a second floor, or a garden/rooftop area, a mesh WiFi system is the standard fix rather than a single stronger router.

• Why mesh over a repeater: a cheap plug-in WiFi extender re-broadcasts a weaker signal and often forces you to switch networks room to room. A proper mesh system (2–3 matched nodes) shares one network name across the whole home and hands your device off between nodes automatically — the difference is obvious the first time you walk from the living room to the far bedroom on a video call.
• What to buy for concrete/thick walls: newer WiFi 6E mesh systems (e.g. TP-Link's Deco X-series and above) use a dedicated 6GHz band between the nodes themselves, which concrete disrupts far less than the everyday 2.4GHz/5GHz bands your phone uses — worth the small premium in a typical Thai condo with concrete floors between units. For a small 1–2 bedroom condo, a basic 2-node WiFi 6 kit is usually plenty; for a two-storey house or anything over ~120sqm, go 3 nodes.
• Where to buy: TP-Link, Xiaomi and ASUS mesh kits are all sold through Lazada, Shopee, Power Buy, BaNANA (still widely called Banana IT) and JIB — see Electronics & Tech for the branches; entry 2-node WiFi 6 kits are a genuinely affordable upgrade, with pricier tri-band/WiFi 6E kits further up. Compare current listings directly, since Lazada/Shopee flash sales move the price around a lot.
• A cheaper first step: before buying anything, ask your fibre provider (AIS/True/3BB) whether your existing router supports a mesh add-on node from the same brand — some plans include one free extender node on request, which may solve a single dead spot without a separate purchase.

How reliable is it, really?#

Very. Fixed-line fibre in Chiang Mai is genuinely stable, and average measured WiFi speeds around the city sit near 180+ Mbps down / ~65 Mbps up as of early 2026 — comfortably fine for video calls, screen sharing, large uploads and streaming. The caveats worth planning around:

• Café WiFi is a lottery. Cafés that cater to nomads invest in good lines (50–100+ Mbps), but plenty advertise "free WiFi" that's really 5–10 Mbps and will drop a video call. For anything mission-critical, use your home fibre or a coworking space, and keep a phone hotspot as backup.
• Short outages happen — brief drops during heavy storms or the occasional area maintenance. A dual setup (home fibre + a mobile plan with tethering) means you're never fully offline, which matters if your income depends on being reachable.
• Power cuts are infrequent but not unheard of; a small UPS for your router is cheap insurance if you take calls all day.

A quick note on VPNs: they work fine and many remote workers run one for work access or home streaming. Thailand does block some categories of website, but everyday browsing, Google, and Western services are unrestricted.

Coworking spaces#

Chiang Mai has one of the densest coworking scenes anywhere, concentrated in and around Nimman and the Old City / Santitham (see Neighbourhood Guides). Day passes let you try before committing, and if you'll work more than ~12–15 days a month a monthly membership almost always pays off. A sample of the well-known spots (prices approximate, mid-2026):

• Punspace — the long-standing nomad favourite, now with two Old City branches: Tha Phae Gate (on Ratchadamnoen Soi 4) and Wiang Kaew. Roughly ฿289 ($9)/day or about ฿3,899 ($115)/month; weekly passes in between. Punspace's own site gives staffed hours of 9am–6pm (Tha Phae closes Sundays), with 24/7 access for members. The Tha Phae branch is the quieter, focus-friendly one; reliable, well-run, good value.
• Yellow Coworking — premium end, 24/7 access, strong community and events calendar, on Nimmanhaemin Road. Around ฿430 ($13)/day or ฿6,000 ($177)/month for full access (lighter membership tiers can run cheaper).
• CAMP @ MAYA — not a paid coworking space but a huge, iconic café on the 5th floor of MAYA; buy ~฿50+ of food/drink for a couple of hours of WiFi and re-up as needed. It is no longer open 24 hours: it now keeps mall hours, 10am–10pm daily, so it won't rescue a late-night deadline. Great for a change of scene, though it gets crowded and noisy at peak times.
• Alt_ChiangMai — a design-led, ergonomics-first space beside the Old City's west (Suan Dok) gate, a short Grab ride from Nimman, pitched at people who care about a proper chair, a fast line and quiet more than rock-bottom price. Monthly hot-desk membership runs around ฿4,000 ($118); good for heads-down work.
• Hub53 — a combined coworking-and-coliving space between MAYA and Chiang Mai University (you can rent a room and desk together), popular with nomads who want everything in one building. Hot-desk memberships start around ฿3,500 ($103)/month, with private offices and meeting rooms extra.
• Heartwork — runs on a café model: buy a coffee, get the WiFi, and work as long as you're a paying customer. There's no formal day-pass or membership, which keeps it cheap and casual — great for a relaxed half-day, less so if you need guaranteed 24/7 access or a locked-in desk. It's on Kamphaeng Din Road, a 15-minute walk from the Night Bazaar, and keeps office hours (Monday–Saturday, roughly 9am–5:30pm).
• Others worth knowing: The Brick Startup Space, Mana Coworking (a quieter, focus-friendly boutique option off Nimman Soi 13), Alt_ChiangMai's smaller rivals and a rotating cast of new spaces around Nimman all have loyal followings — several now include perks like meeting rooms, phone booths, podcast rooms and in-house cafés. New spaces open (and close) regularly, so check current day-pass and monthly rates directly before you commit.

As a rough market map for mid-2026: day passes cluster around ฿200–430 ($6–13), and monthly hot-desk memberships run from about ฿2,500 ($74) at the budget end to ฿6,000 ($177) at the premium, 24/7 end. If you'll work more than ~12–15 days a month, a membership almost always beats paying by the day.

Choosing between them mostly comes down to location (walk from home?), atmosphere (heads-down vs social), and whether you value 24/7 access. Try a couple of day passes before locking into a month. If you're here to work on a visa that permits it, Visas & Visa Agents and Taxes & Tax Residency cover the rules that sit behind the laptop.

Working from cafés#

You don't strictly need a coworking membership — Chiang Mai's café culture is built for laptops. Nimman, Santitham and the Old City are full of specialty coffee shops with fast WiFi and power outlets (see Food & Groceries for coffee picks). Etiquette: buy something, don't camp on a six-top for six hours at peak times, and carry a hotspot as backup for important calls. For anything mission-critical (client calls, big uploads) a proper coworking space or your own home fibre is still the safer bet.

A burning-season note#

From roughly February to April, Chiang Mai's air quality can be poor enough that you'll want to work somewhere well-sealed and air-filtered rather than an open-air café (see Health & Fitness for the full picture). Coworking spaces and mall cafés with good air-con and purifiers become genuinely valuable in those months — worth factoring into a membership decision if you're here for the burning season.

Streaming, VPNs & entertainment#

Once your fibre is in, you'll want to watch things — and here the picture is mostly good with a couple of quirks.

The local streaming services all work. Netflix, Amazon Prime Video, Disney+ Hotstar, Apple TV, YouTube Premium, plus the Asian platforms Viu, WeTV and AIS Play (AIS's own bundle, often free or discounted with an AIS mobile/fibre plan) all operate legally in Thailand. Your existing Netflix/Prime/Disney accounts will simply keep working when you log in here.

The catch is the catalogue, not the access. Netflix switches you to the Thai library based on your IP — roughly 1,200–1,500 titles versus 2,700+ in the US catalogue, so shows you had at home may vanish and the interface picks up Thai-language rows. Prime and Disney behave similarly.

VPNs are legal and widely used. Many remote workers run one anyway — for work access, for privacy on café WiFi, and to see their home Netflix/BBC iPlayer/Hulu library. Using a VPN in Thailand is not illegal (only the underlying activity matters — piracy is still piracy with or without one). For streaming, servers in Singapore or Japan give the lowest latency from Chiang Mai; NordVPN and ExpressVPN are the usual expat picks. If watching your home content is a priority, set up and test the VPN before you fly, since some providers' sign-up pages behave differently once you're on a Thai IP.

One thing to steer clear of: the cheap "all channels for ฿300" IPTV boxes and subscriptions hawked in markets and Facebook groups are almost always unlicensed. Thai courts have held that end-users — not just sellers — can be liable for knowingly streaming pirated content, and a VPN doesn't launder the copyright. The legitimate services above are cheap enough that it's not worth the risk.

Public & free WiFi#

You'll lean on your own line day to day, but free WiFi is genuinely everywhere as a stopgap:

• Chiang Mai Airport (CNX) has free WiFi throughout the terminal — handy the moment you land if you haven't sorted an eSIM.
• Malls (Central Festival, MAYA, One Nimman, Central Chiang Mai Airport, still widely called Airport Plaza) and most cafés and restaurants offer free WiFi; quality ranges from excellent to unusable, so treat it as browsing-grade, not call-grade. More on the malls in Markets, Malls & Walking Streets.
• 7-Eleven and many chains run @TRUEWIFI / AIS Super WiFi hotspots that AIS/True customers can log into automatically — a nice bonus when you're out and about.
• "Free public WiFi" registration: some hotspots ask you to register with a Thai phone number or passport for a legally-required session, a hangover from Thailand's computer-crime logging rules. Nothing to worry about, but it's why your Thai number is useful even for "free" WiFi.

The golden rule for anything sensitive (banking, work logins) on public WiFi: use your VPN, or just tether to your own mobile data instead. Emergency Numbers & Safety covers the phone and banking scams worth knowing about.

Calls, WhatsApp & keeping in touch#

Almost nobody makes traditional phone calls here — LINE is the default for messaging and voice/video within Thailand (businesses, landlords, tradespeople and delivery drivers all expect it), with WhatsApp and Messenger common for international contacts. Both work fine over any decent connection. Your Thai number matters less for talking than for verification: banks, PromptPay, delivery apps and government services all send OTP codes to a Thai mobile, which is the real reason to get a local number rather than living on a data-only travel eSIM. For calling landlines or businesses that don't use LINE, your normal phone dialler works on any Thai SIM; international calls are cheapest over LINE/WhatsApp/FaceTime rather than the carrier.

Leaving town — cancelling fibre & keeping your number#

A few things to sort before you move house or leave Thailand, since they're annoying to fix afterwards:

• Fibre is tied to the address, not to you. When you move, you don't "take it with you" — you either transfer the line to the new address (if the provider covers it) or cancel and re-install. Watch the contract term: many promo prices assume a 12- or 24-month commitment, and breaking early can mean a penalty or clawback of the "free" installation and router. Read the term before signing if there's any chance you'll move within the year, and return the provider's router when you cancel to avoid an equipment charge.
• Keeping your Thai number is worth it if you'll be back — it's tied to your banking, PromptPay and app logins. Prepaid SIMs stay active as long as you top up or have a small balance and use them within the validity window (typically 30+ days per top-up); let it lapse too long and the number is recycled. If you're leaving for a while, a tiny top-up before you go, or switching to a low-cost "keep-alive" plan, saves the hassle of re-verifying everything on your return.
• Porting your number between AIS and True is possible (mobile number portability exists in Thailand) but rarely worth it for a foreigner — easier to just pick the right network up front.

Quick starter checklist#

For a smooth first week: install a travel eSIM before you fly (or buy an AIS/True tourist SIM at the airport or a 7-Eleven — passport required); once you've chosen a longer-term place, ask the building about existing fibre providers and get a 300–500 Mbps line installed; keep your mobile plan's tethering handy as a backup for calls; and grab a day pass or two at Punspace or Yellow before deciding on a monthly coworking membership.

Every place named on this page#

• Punspace Tha Phae Gate~฿289/day, ~฿3,899/month (mid-2026)
  The quieter of Punspace's two Old City branches. Operator lists Mon-Sat 09:00-18:00, 24/7 for members. Address is directory-sourced.
  7 Ratchadamnoen Rd Soi 4, Si Phum, Mueang Chiang Mai, Chiang Mai 50200 (one directory gives 7/2) · Map
• Punspace Wiang Kaew~฿289/day, ~฿3,899/month (mid-2026)
  Punspace's north-Old-City branch. Operator lists Mon-Sun 09:00-18:00, 24/7 for members. Address is directory-sourced.
  10 Wiang Kaew Rd, Si Phum, Mueang Chiang Mai, Chiang Mai 50200 · Map
• Yellow Coworking (Yellow Connect)Day from ~฿429; month from ~฿5,990 (third-party, dated)
  1,500 sqm two-storey hub with a garden event terrace, soundproof call booths and a streaming room; doubles as a startup incubator.
  16/2 Nimmanhaemin Road, Tambon Suthep, Mueang Chiang Mai, Chiang Mai 50200 (soi number disputed across listings) · Map
• CAMP (Creative and Meeting Place) @ MAYASeating free; WiFi on a minimum cafe spend (~฿50 buys 2 hours)
  Vast work-friendly cafe on MAYA's top floor - 100+ seats, standing desks. No longer 24/7: 10:00-22:00 daily, tied to mall hours. No confirmed coordinate.
  5th floor, MAYA Lifestyle Shopping Center, 55 Huay Kaew Road, Mueang Chiang Mai, Chiang Mai · Map
• Alt_ChiangMai฿12,000–18,000/month all-in
  Established co-living space, ~27 ensuite rooms beside Suan Dok Gate; rate includes 24/7 coworking, weekly housekeeping and breakfast.
  Beside Suan Dok (West) Gate, Old City, Mueang, Chiang Mai · Map
• Hub53 Coworking & Coliving Space฿12,000–18,000/month all-in
  Co-living with private and family rooms built around a 24/7 coworking space; near MAYA in Nimman.
  Between MAYA mall and Chiang Mai University, Nimman, Mueang, Chiang Mai · Map
• Heartwork the Sharing SpaceNo day pass; roughly ฿50 food/drink spend unlocks WiFi
  Cafe-coworking hybrid inside a working print and design house - gallery seating, a whiteboard meeting room and call pods. Mon-Sat 09:00-17:30. A 15-minute walk from the Night Bazaar, not in it.
  196 1-2 Kamphaeng Din Road, Hai Ya, Mueang Chiang Mai, Chiang Mai 50100 · Map
• The Brick Startup Space
  Long-running startup-oriented coworking space west of Nimman. No operator website found and 2026 trading not confirmed; check before going.
  31 Sirimangkalajarn Rd Soi 13, Suthep, Mueang Chiang Mai, Chiang Mai (directory-sourced) · Map
• Mana Coworking & Reading Space~฿99 all-day pass (third-party, possibly dated)
  Very small, very quiet co-working and reading room off Soi 13 - among the cheapest all-day desks in Nimman. Closed Saturdays. 2026 trading not independently confirmed.
  28/12 Nimmanhaemin Road Soi 13, Tambon Suthep, Mueang Chiang Mai, Chiang Mai 50200 · Map
• Chiang Mai International Airport (CNX)
  10–15 min from most central neighbourhoods; frequent domestic flights to Bangkok, Phuket, Krabi and regional hubs.
  60 Mahidol Rd, Su Thep, Mueang, Chiang Mai 50200 · Map
• Central Festival Chiang Mai
  The city's largest mall, on the northeast superhighway; Major Cineplex with IMAX, and the default air-conditioned refuge in hot or burning season.
  99/1–99/2 Moo 4, Super Highway Rd, Fa Ham, Mueang, Chiang Mai 50000 (near Arcade Bus Terminal) · Map
• MAYA Lifestyle Shopping Center
  Nimman's anchor mall at the Huay Kaew corner; cinema, food hall, rooftop bars and the most walkable indoor option from Nimman.
  55 Moo 5, Huay Kaew Rd, Chang Phueak, Mueang, Chiang Mai 50300 (corner of Huay Kaew and Nimmanhaemin) · Map
• One Nimman
  Nimman lifestyle complex that frequently hosts pop-up craft and clay classes on its events calendar.
  Map
• Central Chiang Mai Airport (Airport Plaza)
  The city's main full-service mall, 15–20 min from the southwest suburbs; the Airport Plaza junction is a daily traffic pinch point.
  2 Mahidol Rd, Hai Ya, Mueang, Chiang Mai · Map

Prices and plans change frequently — confirm current rates on the providers' own sites or apps before committing. Prices and plans last verified July 2026 (3rd pass) against AIS, True, 3BB and coworking-operator listings and the NBTC's 2026 biometric-SIM notification; structural pass 15 November 2026 (links, place data, CAMP's hours corrected).