An eSIM (embedded SIM) is a small chip already built into your phone or watch that does the job of a physical SIM card — there's no plastic card to insert. Instead of visiting a store, you activate it by scanning a QR code (or through an app), and your number and plan are provisioned onto the device in a few minutes. Everything then works exactly like a normal SIM: calls, texts, data. Because it's digital, an eSIM makes it easy to keep your number when you change phones, hold more than one number on a single device, and download a new line for travel before you've even left home. The main requirement is simply that your device supports eSIM. If you're wondering how to activate eSIM, most providers simply require scanning a QR code and following the on-screen instructions.

Many recent phones do, but plenty don't, so this is the first thing to check. Broadly, iPhone XS and later, Google Pixel from the 3 onward, recent Samsung Galaxy S and Z flagships, and several other recent Android models support eSIM, as do the Apple Watch and some Wear OS watches. Many budget and older phones only take a physical SIM. Because support varies by exact model and even by the variant sold in India, it's worth confirming yours specifically rather than assuming — you can usually check in your phone's settings for an "Add eSIM" or "Add data plan" option. Tell us your model and we'll confirm compatibility before you commit to anything.

No. For a home-network connection, an eSIM carries exactly the same prepaid or postpaid plan at exactly the same price as a physical SIM — the only difference is the form. Converting your existing number from a physical SIM to an eSIM is usually free, and your tariff, number and benefits stay the same. What you're really getting is convenience: instant activation without a store visit, no card to lose or damage, the ability to keep your number when switching handsets, and room for a second line. So don't think of a domestic eSIM as a premium product — think of it as the same plan delivered more conveniently.

For data, a travel eSIM is usually far cheaper. Providers like Airalo and Holafly sell local or regional data packs you install before you fly, giving you internet the moment you land at a small fraction of what default international roaming typically charges. The trade-off is that most travel eSIMs are data-only, so you keep your Indian number active on your physical SIM (or use the provider's app or an internet-calling app) to receive calls and, importantly, the OTPs many Indian banking and login services send. If you need your Indian number to actually ring while abroad, a roaming pack on your home number can complement a data eSIM. We help you pick the right mix for your destination and how you'll use your phone there — see our International Roaming page too.

Yes to two numbers: most eSIM-capable phones support dual-SIM, so you can run a physical SIM plus an eSIM (or on some phones two eSIMs) and keep, say, a work and a personal number on one handset, choosing which to use for calls and data. Moving an eSIM to a new phone is where there's a little friction: unlike a physical card you can't just pop it out and swap it, so you typically re-activate the eSIM on the new device, either through your operator's app or by requesting a fresh QR code — quick, but a step to be aware of before you upgrade. We guide activation and any transfer. This is general guidance rather than a binding quote, and prices and compatibility here are illustrative and vary by exact device and destination. For the underlying tariffs see our Prepaid SIM Plans and Postpaid Plans, and for trips abroad see our International Roaming page.