eSIM basics
eSIM pros and cons: do you actually need one?
3 min read · Updated September 13, 2026
An eSIM lets you install a plan in advance while keeping your existing number, which makes it convenient for personal trips. That said, your phone has to be a supported model, and depending on the product, top-up (reuse) support or the choice of network may be limited. If your phone isn't supported or the setup feels like a hassle, a physical SIM or roaming may be better — so compare them alongside your roaming perks.
Pros
- Usually cheaper than roaming
- Add just a data line while keeping your existing number (SIM)
- Buy and install before you leave (no fumbling at the airport)
- No tiny SIM card to lose
Cons
- Needs an eSIM-capable model + no carrier lock
- Top-up (reuse) support varies by product; if unsupported, you install a new one
- The choice of network can be limited depending on the product
- Customer support quality varies by provider when problems arise
When a physical SIM or roaming may be better
- When your phone doesn't support eSIM or has a carrier lock → a physical SIM
- When it's a very short trip and setup feels like a hassle → roaming (simple, but pricey)
- When several people share one large data pool → consider pocket Wi-Fi
FAQ
Is an eSIM always the best choice?
For solo or small-group trips that are mostly about data, it's usually the cheapest and easiest. That said, your phone has to be a supported model, and the setup can feel fiddly, so for some people roaming may be better.
What downsides should I check before buying?
Check whether it works on your phone, and whether it supports top-ups (reuse) or lets you reinstall it after transferring it to another device or deleting it. Network choice, tethering, and support conditions also differ by product, so it's good to check before buying.