eSIM Guides
From what an eSIM is to installing it, using one in mainland China, and topping up when data runs out â everything you need to get online while you travel.
- What Is an eSIM? How It Differs from a Physical SIMAn eSIM is a digital SIM built into your phone â no physical card needed. A plain-language guide to eSIM vs physical SIM, the travel upsides, which phones support it, and what to check before you buy.
- How to Install and Activate an eSIM (iOS & Android)How to install your eSIM after purchase: step-by-step for iOS and Android, the right time to activate, and how to troubleshoot a failed activation.
- Using an eSIM in Mainland China: Exit IP, ChatGPT, and Out-of-the-Box AccessGetting online and staying unrestricted is the hard part in mainland China. How the China (Singapore line) eSIM combines China Unicom's local signal with an offshore exit IP for instant access, why common overseas apps work, and how to pick a plan.
- How to Top Up an eSIM When Data Runs OutRunning low does not mean buying a new card. What top-up (recharge) is, how to do it in My eSIM, how stacking works for total and daily plans, and the refund rules.