Stay connected from the moment you land in Bangkok. Here's how an eSIM gets you online in Thailand with fast 4G/5G and zero roaming bills.
Thailand eSIM: your shortcut to instant data
Landing in Thailand and hunting for a SIM kiosk after a long flight is no fun. With an eSIM you skip the queue entirely: scan a QR code before you leave home and you're online the second you touch down at Suvarnabhumi.
Why use an eSIM in Thailand
Instant setup — install before your trip, activate on arrival
No roaming shock — one clear price, no surprise bills back home
Keep your number — your home line stays active for calls and texts
No plastic SIM — nothing to swap, lose, or fumble with at the airport
Thailand has fantastic mobile coverage, so streaming maps in Chiang Mai or video-calling from a Phuket beach just works.
Thailand is served by three strong operators: AIS, DTAC, and TrueMove. All three run wide 4G networks and fast-growing 5G, especially in Bangkok, Chiang Mai, and Phuket. Coverage is excellent across cities, tourist islands, and main highways. On remote islands or deep in the northern hills you may drop to 4G or slower, but for the vast majority of travelers speeds are more than enough for maps, social, and streaming.
How to get connected
1. Buy your Thailand eSIM and receive the QR code by email within minutes.
2. Scan the QR code in your phone's settings (Cellular / Mobile Data) over Wi-Fi.
3. Activate data roaming for the eSIM line when you land — you're online instantly.
How much data do you need
Light use (maps, chat, email): 1–3 GB for a week
Average traveler (social, browsing, some video): 5–10 GB
Heavy use (streaming, hotspot, remote work): 15–20 GB or unlimited
A two-week island-hopping trip with daily uploads usually fits comfortably in 10–15 GB.
Good to know
Currency: Thai baht (THB)
Capital: Bangkok
Language: Thai
Time zone: ICT (UTC+7)
Don't miss: the Grand Palace and Wat Arun in Bangkok, the temples of Chiang Mai, and the islands of Phuket and Krabi
FAQ
Is my phone compatible?
Most phones from 2018 onward support eSIM — iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy S and Z models. Check Settings for an "Add eSIM" option.
When should I install it?
Install before you fly while you have Wi-Fi. Choose to activate on arrival so your plan's validity starts in Thailand.
Will I keep my WhatsApp number?
Yes. WhatsApp stays tied to your original number, so you keep the same account and chats. The eSIM just provides data.
Yes, eSIMs work well throughout Thailand, which has modern, widespread mobile coverage. A HelloSIM Thailand eSIM connects to a local partner network as soon as you arrive.
Which phones are compatible with a Thailand eSIM?
Most devices from 2018 on support eSIM, including iPhone XS and later, Google Pixel 3 and later, and recent Samsung Galaxy S, Note and Z models. Confirm by checking for an EID in your phone settings.
How do I know if my phone supports eSIM?
On iPhone, look under Settings, General, About for an EID or an Add eSIM option; on Android, check Settings, Connections, SIM manager. If you can add an eSIM, you are good to go.
Does my phone need to be unlocked for a Thailand eSIM?
Yes, your phone must be carrier-unlocked. If it is locked to your home carrier, the eSIM will not activate, so unlock it before you travel.
How do I buy a HelloSIM eSIM for Thailand?
Pick a Thailand plan on the HelloSIM website or app, pay online, and receive a QR code with setup instructions by email within minutes.
How do I install and activate my Thailand eSIM?
Scan the QR code from HelloSIM in your phone's eSIM setup screen to download the plan. You can then switch it on for data when you land in Thailand.
How do I add the eSIM on an iPhone for Thailand?
Go to Settings, Mobile Data, Add eSIM, Use QR Code and scan HelloSIM's code. Label it Thailand and set it as your data line on arrival.
How do I add the eSIM on Android for Thailand?
Open Settings, Connections, SIM manager, Add eSIM (wording varies by brand), scan the HelloSIM QR code, and download the profile. Then enable it for mobile data.
Which networks does HelloSIM use in Thailand?
HelloSIM connects to major Thai operators such as AIS and True, which offer excellent nationwide coverage. Your eSIM selects an available partner network automatically.
Is there good 4G coverage in Thailand?
Yes, 4G/LTE is extensive across Bangkok, Chiang Mai, Phuket, Pattaya, Krabi and the islands. Coverage is strong even in many rural and beach areas.
Is 5G available in Thailand?
Yes, Thailand has one of Southeast Asia's most developed 5G networks, with wide 5G in Bangkok, Phuket, Chiang Mai and other cities. Your device uses 5G where available and falls back to 4G elsewhere.
How much data do I need for a week in Thailand?
Around 5 GB covers a week of maps, chat, social media and browsing for most travellers. If you stream a lot or share plenty of videos, 10 to 15 GB is safer.
How much data do I need for two weeks in Thailand?
Two weeks of typical use runs roughly 8 to 15 GB, depending on how much video you stream and hotspot you use. Heavy users should look at unlimited or larger plans.
How much does a Thailand eSIM cost?
Pricing depends on data volume and validity, but Thailand plans are generally affordable and cheaper than roaming. See the HelloSIM Thailand page for current prices.
How long is a Thailand eSIM valid?
Validity varies by plan, usually from a few days up to 30 days. The clock typically starts when the eSIM first connects to a Thai network.
Can I use my Thailand eSIM as a hotspot?
Yes, tethering is supported, so you can share data with a laptop, tablet or a travel companion's phone. Remember that hotspot use draws down your allowance faster.
Can I keep my home number active in Thailand?
Yes, with dual-SIM you keep your usual SIM for calls and texts while the eSIM handles data. Switch off roaming on your home line to avoid surprise charges.
Should I activate my Thailand eSIM before or after arrival?
Install it beforehand over Wi-Fi, but only turn it on for data once you are in Thailand so the validity does not start early. Most plans activate on first connection to a local network.
Do I need to configure APN settings in Thailand?
Usually not, as the APN sets itself automatically. If data does not work, HelloSIM supplies the correct APN to enter manually.
Do I have to turn on data roaming for the eSIM?
Yes, enable data roaming on the HelloSIM line, since the eSIM operates as a roaming profile. Keeping your home SIM's roaming off means no charges there.
What if I run out of data in Thailand?
You can instantly top up or buy an additional plan through the HelloSIM app or website, keeping the same eSIM. There is no need to reinstall anything.
Can I top up my Thailand eSIM?
Yes, add more data online whenever you are running low and it applies to your existing eSIM profile right away.
Does my Thailand eSIM work on the islands like Phuket, Koh Samui and Krabi?
Yes, popular islands and beach destinations such as Phuket, Koh Samui, Koh Phi Phi and Krabi have solid 4G and 5G coverage. Signal may weaken on remote beaches or boat trips.
Can I use my Thailand eSIM in nearby countries like Cambodia or Vietnam?
A Thailand-only plan works only in Thailand. For a multi-country Southeast Asia trip, choose a HelloSIM regional or Asia plan instead.
Will I have internet when I land at Bangkok or Phuket airport?
Yes, once your eSIM is installed and roaming is on, it should connect soon after landing at Suvarnabhumi, Don Mueang, Phuket or Chiang Mai airports. Turn off airplane mode to get online.
Can I make calls and texts with a HelloSIM Thailand eSIM?
The plans are data-only and do not include a Thai phone number for standard calls or SMS. Use WhatsApp, LINE, FaceTime or similar apps to call and message over data.
Does the eSIM include a Thai phone number?
No, it is data-only with no local number. Your home number remains reachable on your primary SIM if you keep it in the phone.
My Thailand eSIM shows no service, what should I do?
Check that data roaming is on, the HelloSIM line is selected for data, and airplane mode is off. Restarting the phone or toggling airplane mode usually re-establishes the connection.
My eSIM will not connect to a network in Thailand, how do I fix it?
Manually select a network in your mobile data settings and choose a partner like AIS or True. Confirm you have actually arrived in Thailand, since the eSIM only registers on local networks.
What is the emergency number in Thailand?
Dial 191 for police and 1669 for medical emergencies; the Tourist Police line is 1155 with English-speaking help. Emergency calls work even without a data plan.
What internet speeds can I expect in Thailand?
On 5G or good 4G you can expect fast speeds suitable for HD streaming, video calls and quick uploads. Speeds vary with location and network congestion.
Is the LINE app important to have in Thailand?
Yes, LINE is the dominant messaging app in Thailand, widely used by locals, hotels and businesses. Install it before your trip so you can chat and call over your eSIM data.
Can I get a refund on my Thailand eSIM?
Unused, un-activated eSIMs can usually be refunded per HelloSIM's policy. Once installed or used, plans are typically non-refundable, so check the terms at checkout.
Should I download offline maps before visiting Thailand?
Yes, offline Google Maps for Bangkok, Chiang Mai, Phuket and any areas you will explore save data and help if signal drops. It is especially handy on islands and rural roads.
Can I install my Thailand eSIM before flying?
Yes, set it up at home over Wi-Fi so it is ready to go, but wait to enable data until you land to preserve your validity period. This avoids wasting days of the plan.
Will adding the eSIM remove my existing SIM or eSIMs?
No, installing a HelloSIM eSIM does not delete other SIMs. Your phone can store several eSIM profiles, and you choose which one carries data.
Can I share one Thailand eSIM between two phones?
No, each QR code installs on a single device only. Buy a separate plan for a second phone.
Is a HelloSIM eSIM cheaper than carrier roaming in Thailand?
Usually yes, an eSIM data plan costs far less than typical international roaming. It also protects you from expensive pay-as-you-go roaming rates.
Do I still need to buy a local SIM at the airport in Thailand?
No, with a HelloSIM eSIM you skip the airport SIM counters and passport registration. You are connected the moment you arrive and enable data.
Any tips for staying connected in Thailand?
Set up and test your eSIM before flying, install LINE and offline maps, and buy a little extra data for streaming and hotspot use. Hotel and cafe Wi-Fi is common, so lean on it to stretch your plan.
