Activate SIM upon arrival in Thailand to ensure validity.
You can do it easily by yourself following these steps.
- Connect the WiFi and download "True iService App" from the Play Store or App Store or click here
- Turn off WiFi
- Insert SIM card in first tray slot
- Scan QR Code to enter the process or click here
- Scan SIM barcode
- Take a selfie
- Choose Passport
- Take a photo of passport
- Recheck Information and Submit
- Registration Success SIM Card is ready to use