Getting mobile data in Phuket is straightforward. Thailand's major mobile networks sell tourist SIMs and eSIMs, airport counters are easy to use, and prepaid data is widely available. The main decisions are whether to organise an eSIM before you fly or buy a physical SIM after arrival, how long you need the number for, and whether you need hotspot use, local calls or only data.
Physical SIM or eSIM?
An eSIM can be convenient because you can set it up before landing and keep your home SIM in the phone for messages or banking codes. A physical tourist SIM is easy if your phone has an unlocked SIM slot and you prefer staff to install and activate it. Check that your device is unlocked and eSIM-compatible before purchasing.
Thailand requires SIM registration
Tourist SIMs must be registered to the user. Current True-dtac terms require a valid passport, and AIS also directs tourists to complete identity registration. Use your own passport at an official counter or recognised retailer rather than accepting a pre-registered anonymous SIM from an informal seller.
Buying a SIM at Phuket Airport
Phuket International Airport has official mobile counters in the arrivals area, making airport purchase the easiest option if you want working data immediately. Current True-dtac promotional terms specifically list Phuket airport counters in international and domestic arrivals. Airport packages may prioritise convenience over the cheapest possible local prepaid deal, so choose speed or price according to your needs.
Buying one after you reach town
Official operator shops and established retailers are available in Phuket's major centres and shopping areas. Buying later gives you time to compare packages, but you will need some other way to navigate or contact your accommodation after landing. Download your hotel address and an offline map before departure if you plan to wait.
AIS, True and dtac
AIS and the True-dtac group all market prepaid tourist connectivity. Coverage can vary by exact location and building, so there is no single network that is automatically best for every beach, villa or island trip. For a normal holiday around Phuket's developed areas, package duration, data allowance, hotspot rules and convenience are usually more useful comparison points than advertising claims about peak speed.
Do not buy by the word “unlimited” alone
Read the package conditions. “Unlimited” can describe data access while still applying a speed tier, fair-use rule or different allowance for hotspot use. Check the valid number of days, whether calls are included and what happens after any high-speed quota is used.
Passport and activation rules matter for longer stays
Current operator guidance links tourist-SIM use to identity verification and activation windows. AIS says a tourist number registered to an individual must be activated within 60 days of registration, with re-verification required if that window is exceeded. True-dtac tourist terms also impose identity and validity rules. Long-stay visitors should confirm the current policy with the operator instead of assuming an airport tourist package can be topped up indefinitely.
Keep your home number for banking if possible
Dual-SIM phones are useful because you can use the Thai SIM for data while keeping your home line available for bank codes and account recovery. Before travel, disable expensive roaming data on the home SIM and check whether receiving SMS abroad is free with your provider.
WhatsApp, LINE and other messaging
WhatsApp works normally over mobile data and Wi-Fi. LINE is widely used in Thailand and some local businesses, tour operators and drivers may offer it as a contact option. Save key booking confirmations and hotel details offline in case you briefly lose data.
Hotel and café Wi-Fi
Wi-Fi is common in Phuket hotels, resorts, cafés and coworking spaces, but quality varies. If you are working remotely, do not assume the room's advertised Wi-Fi will handle video calls. A mobile data plan with hotspot permission can be a useful backup, especially in villas or during local outages.
Public Wi-Fi and account security
Use the same caution you would at home on public networks. Prefer mobile data for banking or sensitive account changes, keep your phone and apps updated, use strong device security and avoid installing unknown profiles or apps offered by unofficial sellers.
Calling Thai numbers
A local number can be useful for drivers, restaurants, delivery apps and accommodation. If a tourist package includes local calls, check whether they are truly unlimited or subject to per-call limits. For international calls, internet calling is often simpler than relying on carrier IDD rates.
Best setup for most Phuket visitors
For most travellers, the easy setup is an unlocked dual-SIM phone, a Thai tourist eSIM or physical SIM sized to the trip, and the home SIM left available for important texts with roaming data turned off. Download offline maps before arrival and keep the operator app or support number handy if you need to check remaining validity.