100-300 Mbps fiber in most Nimman buildings — Chiang Mai punches above its price
Most modern condos in Nimman, Hang Dong, and along Huay Kaew Rd have symmetric fiber from AIS Fibre or 3BB at 100 to 300 Mbps for around 600-900 THB (USD 18-27) per month. Older Thai apartments and Old City guesthouses still run on VDSL at 30-60 Mbps, which handles video calls but not heavy uploads. The 75 Mbps city average hides this split — always ask for a Speedtest screenshot before signing a lease.
Mobile 4G/5G is fast. Downtown Chiang Mai averages 80-150 Mbps on AIS 5G and TrueMove H 5G. Tethering from your phone is a genuine primary setup, not just a fallback.
Average Speed
75 Mbps residential (up to 300 Mbps on fiber)
Reliability
Good in Nimman and modern condos, moderate elsewhere
| Provider | Type | Speed | Note |
|---|---|---|---|
| AIS Fibre | Fiber (FTTH) | 100-1,000 Mbps | Largest fiber network. Best install lead time, app-based onboarding. |
| 3BB | Fiber (FTTH) | 100-1,000 Mbps | Strong coverage in older Nimman and Santitham buildings. |
| True Online | Fiber / Cable | 100-500 Mbps | Bundled often with TrueMove mobile. Budget-to-mid plans. |
| NT (National Telecom) | VDSL / Fiber | 30-200 Mbps | Government provider, broadest rural coverage. |
Tourist SIM and eSIM options
Grab a SIM at the AIS or TrueMove counter in the Chiang Mai airport arrivals hall (open 24/7). Bring your passport.
| Provider | Data | Price | Note |
|---|---|---|---|
| AIS Tourist SIM | 15 GB / 8 days | USD 8 | Good 5G in town, activate at counter |
| AIS Tourist SIM | 50 GB / 30 days | USD 21 | Best value for a month of nomad work |
| TrueMove H Tourist | 15 GB / 8 days | USD 8 | Similar coverage, marginally cheaper data roaming |
| Airalo eSIM (Thailand) | 10 GB / 30 days | USD 12 | Install before landing, no physical SIM needed |
| Holafly eSIM | Unlimited / 30 days | USD 64 | Unlimited, throttled after fair use |
For stays of 3+ months, register a local post-paid AIS or TrueMove SIM with your passport and a Thai address — around 600 THB (USD 18) per month for unlimited 5G.
What to check before booking accommodation
- Ask for a Speedtest screenshot of the actual apartment. Nimman condo listings often advertise “high-speed WiFi” on an old 30 Mbps VDSL line. Verify.
- Ask if the router is in the work area. Concrete Thai walls kill 5 GHz signal — a router at the front desk and a laptop in the back bedroom is 20 Mbps even on a fiber plan.
- Check backup power. Chiang Mai gets occasional short outages (few times per month in rainy season). If your host has a backup router or the building has a generator, ask.
Coworking internet
Punspace and Alt_ChiangMai both guarantee symmetric 250-300 Mbps fiber. CAMP@Maya typically delivers 80-120 Mbps, enough for most calls but not heavy cloud-render uploads. Full breakdown in the coworking guide.
Public WiFi
True ID and AIS operate thousands of free hotspots — sign in once with a Thai number and you get auto-login across the city (Maya mall, Central Festival, many cafes). Speeds vary 10-60 Mbps. Fine for email and Slack, not reliable enough for video calls.
For serious work: stick to your condo’s fiber connection, a coworking space, or a well-tested cafe. Keep a mobile-data hotspot as a backup for the 2-3 times a month something drops.