If it’s a SIM card purchased from 7/11 or a mobile shop — yes, you can extend it in two ways:

1. Keep the packaging that shows the tariff and phone number. You can top up the SIM at any mobile shop or 7/11. Just tell the staff “top up for my phone,” give them your number and the amount. The current plan will remain active.
2. Download the mobile operator’s app, log in using your phone number, choose a package to extend your plan, and pay through the app.

The second option allows you to choose a better or more affordable plan and saves you time since you won’t need to visit a shop.

An even more convenient option is to use an eSIM — you’ll be connected as soon as you land in Phuket, without the need to buy or insert a physical SIM card. All settings are done directly on your phone. You can choose a plan and buy an eSIM via this link: https://t.me/travelmobile_bot. It’s a trusted service we recommend.

Find more travel tips in the Useful Info section.