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Planning a trip to Thailand? Staying connected with loved ones back home and navigating your way around the beautiful country are essential parts of any vacation. An AIS SIM card can be your key to staying online and in touch throughout your adventure. This guide will walk you, the tourist, through everything you need to know about AIS SIM cards, from choosing the perfect data plan to purchasing and activating your card. With the right AIS SIM card, you’ll be able to share your Thailand experiences, use maps and travel apps, and stay connected with ease.
Table of Contents
I. About AIS
AIS (Advanced Info Service Public Company Limited) is Thailand’s leading telecommunications network operator and the country’s largest mobile carrier, serving around 45.8 million mobile subscribers as of 2024.
With a nationwide 4G footprint and a 5G network covering over 95% of the population, AIS has maintained roughly half of Thailand’s mobile revenue market share while rapidly expanding its 5G user base to about 12 million in 2024 and nearly 18 million by 2025.
In 2024 the company generated approximately THB 213.6 billion in total revenue and over THB 33.6 billion in net profit, underscoring its strong financial performance and continued leadership in the Thai telecom market.
Check out more details on AIS official website.
II. AIS Mobile Operator Services
AIS (Advanced Info Service) provides its customers with a wide range of services in Thailand, including:
- Mobile network: Reliable, fast 4G/5G coverage across airports, major cities (Bangkok, Chiang Mai, Phuket, Pattaya), and most tourist hotspots, suitable for maps, ride-hailing, and social media.
- Tourist SIM/eSIM: AIS sells dedicated tourist SIMs and eSIMs at airports, AIS shops, and partner convenience stores, typically including high‑speed data, local call credit, and sometimes free calls to AIS numbers or basic roaming options.
- Prepaid plans: Easy top‑up via apps, 7‑Eleven and other convenience stores, with short‑term data packages (1–30 days) that are ideal for holidays or workations.
- Roaming options: For travelers who keep their home SIM active, AIS offers international roaming packages from Thailand, and also supports roaming for many foreign operators, so your home SIM can latch onto AIS when you arrive.
- Digital nomad friendly: Long‑stay visitors can use AIS prepaid or simple monthly plans with generous data, making it convenient for remote work in cafés, co‑working spaces, and rentals with good mobile hotspot usage.
As a tourist, you can also use almost all the AIS services in Thailand. That's why AIS is one of the best options for tourists to stay connected in Thailand.
III. AIS Coverage in Thailand
AIS is one of Thailand’s largest mobile network operators, with strong nationwide network coverage. Here are some details on AIS coverage in Thailand:
- In H1 2025, AIS won the Speedtest Award for Best Mobile Network and Best 5G Network in Thailand, recording median download speeds of 104.33 Mbps and median upload speeds of 23.21 Mbps, with a Speedtest Connectivity Score of 76.05.
- For Q3-Q4 2025, AIS secured the Speedtest Award for Fastest 5G Mobile Network, achieving a Speed Score of 54.23.
- AIS also dominated 12 Ookla Speedtest Awards in H2 2025 across mobile speed, consistency, and coverage, confirming its top position for network reliability nationwide.
Data from https://www.speedtest.net/awards/thailand/
IV. Best AIS eSIMs for Tourists
AIS offers many attractive eSIM plans suitable for tourists. You can consider your data usage to choose the right data plan for your trips.
| Plan Name | Validity | Data Allowance | Price (THB) | Best For |
| 8 Days (Recommended) | 8 Days | Unlimited Max Speed | 499 THB | Standard vacation (Most popular) |
| 15 Days (Best Seller) | 15 Days | Unlimited Max Speed | 699 THB | Two-week holiday |
| 30 Days | 30 Days | Unlimited Max Speed | 1,199 THB | Monthly travelers / Digital nomads |
| 5 Days | 5 Days | Unlimited Max Speed | 399 THB | Short business trips or long weekends |
| 60 Days (Best Value) | 60 Days | Unlimited Max Speed | 1,599 THB | Long-term stays |
| 1 Day | 24 Hours | 1GB at 10Mbps | 49 THB | Transit or emergency data |
Key Features Included in All “Unlimited Max Speed” Plans:
- 5G/4G Network: Access to Thailand’s fastest and widest 5G coverage.
- Social Apps (Data-Free): Unlimited data for popular apps like Facebook, Instagram, WhatsApp, TikTok, LINE, and WeChat (even if your primary high-speed quota were limited, though these plans are currently advertised as unlimited).
- Free Calling: Unlimited calls to other AIS numbers.
- 100 THB Bonus Credit: Included for calls to other Thai networks or international calls (using the 00300 prefix for super savings).
- AIS Super WiFi: Unlimited free access to high-speed WiFi at malls, airports, and train stations.
Tips:
To purchase and register a SIM card, you must provide proof of identity, like a passport. Then, an AIS Thailand eSIM seems to be a better option for travelers. You can install and activate eSIM right in your country and be ready to go.
VI. How Much Does AIS SIM Cards Cost?
The cost of an AIS SIM card or eSIM in Thailand can vary depending on your chosen package and the retailer you purchase it from. Here are some approximate costs for AIS SIM cards:
- AIS eSIM plans for tourists: The prices of eSIM are based on the data and validity and other benefits of the package. The prices are from 399THB to 1699THB (about $12 ~ $50).
- AIS SIM card with no packages: The cost of a basic AIS SIM card without any packages or promotions is typically around 49 to 99 Thai Baht (THB) or approximately $1.5 to $3.
- AIS SIM card with tourist packages: AIS offers various tourist packages that include data, voice, and SMS for a specific period, ranging from 3 to 30 days. The cost of these packages can range from 299THB to 1250THB (approximately 9 to 19 US dollars), depending on the package you choose.
Notes:
- It's important to note that prices may vary depending on the retailer and location where you purchase the AIS SIM card or eSIM.
- Additionally, some retailers may offer promotions or discounts on AIS eSIM and SIM cards, so asking about any available deals is always a good idea.
Check out more deals on AIS Thailand eSIM!
VII. Where to Buy AIS SIM Card and eSIM?
Here are the guides for buying AIS eSIM and SIM cards for tourists:
1. Where to Buy AIS eSIM?
You can buy AIS eSIM online through the AIS Online Store or visit an AIS store in person. Here are the steps to buy an AIS eSIM online:
- Visit the AIS Online Store at https://store.ais.co.th/en/ or go to https://www.ais.th/esim-traveller/
- Select “eSIM plans” from the menu bar at the top of the page.
- Choose your preferred eSIM plan and click on “Buy Now”.
- Fill out the required information, including your name, phone number, and email address.
- Choose your payment method and complete the transaction.
- Once the transaction is complete, AIS will send you an email with instructions on how to activate your eSIM.
Alternatively, you can visit an AIS store to buy an eSIM. You can find the nearest AIS store by visiting the AIS website at https://www.ais.co.th/store/en/ and entering your location.
Besides buying Thailand AIS eSIM from the official AIS mobile operator, you can choose other local Thailand eSIM providers. It will bring you more benefits like:
Why you should buy an AIS eSIM on thailandesim.com
- Various data and validity options
- Easy online payment
- More accessible customer support (24/7)
2. Where to Buy AIS Tourist SIM Card?
AIS SIM cards for tourists can be purchased at various locations throughout Thailand, including airports, convenience stores, and mobile phone shops. Here are some of the most common places where you can buy an AIS SIM card as a tourist in Thailand:
- At the airport: AIS SIM cards are available at many international airports throughout Thailand, including:
- Suvarnabhumi Airport in Bangkok (International Arrivals Hall Between gate 6 and 7)
- Phuket International Airport (1st floor International Arrivals Hall)
- Donmuang International Airport ( 1st floor International Arrivals Hall 1)
- Samui International Airport (1 st floor Arrivals Hall)
- AIS shop: You can also purchase a AIS tourist SIM card at AIS shop. Find the local store HERE.
- Family marts: AIS SIM cards can be purchased at 7-Eleven, Family Mart, and other convenience stores throughout Thailand.
- Mobile retailer shops: Many mobile retailer stores in Thailand sell AIS SIM cards. These shops can be found in shopping malls, street markets, and other commercial areas. Some name can be found like AIS Telewiz, AIS Buddy, and other nationwide mobile retailer shops. Look for the AIS logo or ask the store staff for assistance.
- AIS SIM cards can also be purchased through the company’s website or e-commerce platforms such as Lazada and Shopee.
Tips:
- When purchasing an AIS SIM card, be sure to bring your passport, as it will be required for registration.
- It's recommended to prepare cash when buying Thailand SIM cards at local stores.
- As a tourist, you may be eligible for special tourist packages that include data and calling minutes for a specific period. Be sure to ask the sales representative about any available promotions or packages.
VIII. Calls and SMS Rate of AIS in Thailand
Call to AIS network 1.07 Baht/Time (Time not exceeding 60 minutes), the excess is charged at 1.07 Baht/minute. For SMS, the charge often is 3.21 Baht/message, 6.42 Baht/message. Internet rate is around 1.61 Baht/MB. A fraction of a minute is one minute for each call.
IX. How to Top up Your AIS SIM Card
There are several ways to top up your AIS (Advanced Info Service) SIM card in Thailand. Here are some of the most common methods:
- Via AIS website or the mobile app: You can use your AIS SIM card by logging into your AIS account on the company’s website or mobile app. Select the top-up option and enter the amount you wish to add to your account. You can pay using a credit or debit card or other online payment methods.
- Via AIS prepaid cards: AIS prepaid cards are available at convenience stores, supermarkets, and other retailers across Thailand. Scratch off the silver coating on the card to reveal the PIN, then dial 123, followed by the PIN and # to top up your account.
- After purchasing AIS prepaid card, dial *120*VoucherCode# or dial *120# and follow the instructions. For example, if your voucher code is 123456, you would dial *120*123456#.
- You can also recharge online with (international) debit and credit cards.
- Via AIS top-up machines: AIS top-up machines are available at many convenience stores, supermarkets, and other retailers across Thailand. Insert your AIS SIM card into the machine, select the top-up amount, and insert the cash payment.
- Via bank ATM or online banking: If you have a bank account in Thailand, you can top up your AIS SIM card using your bank’s ATM or online banking service. Simply select the top-up option and enter your AIS phone number and the amount you wish to add to your account.
These are common methods to top up your AIS SIM card in Thailand. Keeping your SIM card topped up is important to ensure you can continue using AIS's services.
X. How to Check AIS Balance – All AIS USSD Codes that You Need to Know
Here are the instructions on how to check AIS balance usage and other USSD codes when using AIS services:
| How to | USSD codes |
| Check your usage and balance service | *121#📞 or dial *121📞 |
| Checking bonus minutes and data usage | *121#📞 |
| Fee call bonus checking | *121*2#📞 |
| Remain package checking | *121*3#📞 (The total remaining usage quota of your Internet/ SMS/ iSMS/MMS/ WiFi package(s) will be sent to you via SMS) |
| Internet balance checking | *121📞, then Press ’4’ to check the Internet balance |
| Check/Change/Subscribe packages | *777📞 |
| Balance transfer service | *140*1*[Destination AIS One-2-Call! Number in 10-digit]*[Transfer amount]#📞 |
| A balance transfer request service “New” | *140*12*[Destination AIS One-2-Call! /Postpaid Number in 10-digit]*[Request Amount]#📞 |
| Validity transfer service | *140*2*[Destination AIS One-2-Call! Number in 10-digit] *[Days of Validity to transfer]#📞 |
| Call me back service | *222*[Destination Number in 10-digit]# |
| Change preferred language service | *118*2#📞 (“ENGLISH”) |
| On-top internet packages | *501#📞 (The main menu will be displayed on the screen. Press ‘Reply’* and type desired menu number you wish to subscribe to) |
| Get your own phone number | *545#📞 |
| Get WiFi username and password | *388#📞 |
| Turn on international roaming | *125 or *125*1#📞 |
| Check number register | *161#📞 |
| Use a voucher PIN scratch card code | Press: *121# - Check balance Press: *120*[voucher_code]#📞 Press *121# - Check balance |
XI. AIS vs Other Thailand Mobile Operators
In Opensignal’s June 2025 Mobile Network Experience Report for Thailand, AIS earned the most awards overall (five outright wins), outperforming DTAC and TrueMove H across key metrics relevant to tourists like coverage and 5G access.
Key Comparisons
Check the full report: Opensignal Thailand Mobile Network Experience, June 2025.
XII. AIS SIM Card Alternatives for Tourists
While AIS SIM cards are a popular choice for tourists visiting Thailand, several alternative options are available, including eSIMs. Here are some AIS SIM card alternatives for tourists:
- AIS eSIM: eSIMs are available from various mobile network operators in Thailand, including AIS, dtac, and TrueMove H. They can be activated before arriving in Thailand or at the airport. eSIMs eliminate the need for a physical SIM card and can provide more flexibility and convenience.
Buy AIS Thailand eSIM online without a passport!
- dtac Happy Tourist SIM: The dtac Happy Tourist SIM is a popular alternative to the AIS SIM card for tourists visiting Thailand. Check out more detailed guides on dtac SIM cards!
- TrueMove H Tourist SIM: TrueMove H is another Thailand mobile network operator offering a tourist SIM card.
- Wi-Fi hotspots: Instead of purchasing a SIM card, tourists can also rely on Wi-Fi hotspots for internet access. Many cafes, restaurants, and public areas in Thailand offer free Wi-Fi, and paid Wi-Fi services are available.
Overall, while AIS SIM cards are a popular choice, several alternative options for tourists visiting Thailand, including eSIMs, dtac Happy Tourist SIM, TrueMove H Tourist SIM, and Wi-Fi hotspots, each option has its advantages and disadvantages, so be sure to choose the one that best suits your needs.
Tips:
To buy a SIM card in Thailand as a foreign tourist, you must provide a passport or proof of your ID. On the other hand, with eSIM, you can purchase online and instantly activate to use.
XIII. Final Words
With this comprehensive guide, you’re now equipped to navigate the world of AIS SIM cards in Thailand for 2025. Don’t hesitate to explore the AIS website or consult a representative at their stores for the latest deals and recommendations. With the right AIS SIM card, you can focus on creating unforgettable memories in Thailand, knowing you’ll always be a click or call away from loved ones back home.
XIV. FAQs
What is AIS mobile operator?
AIS (Advanced Info Service) is one of Thailand’s largest mobile network operators, offering a wide range of services to individual and corporate customers.
Does AIS offer eSIM?
Yes, AIS offers various options for eSIM plans.
What types of packages does AIS offer?
AIS offers a variety of packages to meet the needs of different customers, including prepaid and postpaid plans, tourist packages, and data packages.
How do I top up my AIS SIM card?
You can top up your AIS SIM card by purchasing a top-up card from an AIS retailer, using the AIS online top-up service, or by dialing *121# from your phone.
How to buy an AIS eSIM card?
You can buy AIS eSIM by going to AIS official website or local eSIM providers like thailandesim.com and place an online order.
Is AIS or DTAC better?
They have almost the same quality, the better one will be based on your demand. If you want more coverage, AIS is a better option. If you want more data and promo, dtac seems to be a better option.
How to register an AIS SIM card?
You can go to the local store and provide some ID information for registering AIS SIM card.