How eSIM and physical SIM differ
An eSIM is built into a compatible phone. Your carrier supplies a digital profile, which you install through your device settings using the method it supports. That could be an activation prompt, a QR code, a carrier app, or a transfer from another phone. Apple’s eSIM setup guide
A physical SIM is a removable card that fits in your phone’s SIM tray. You insert the card, then follow your provider’s activation steps. If your phone has no SIM tray, check the manufacturer’s specifications for its digital SIM options.
Start with the SIM type your exact model supports. For phones that support both, eSIM avoids waiting for a card, while a removable SIM can be practical when your provider supports moving it between compatible devices.
What to check before bringing your phone
- Find the exact model. Look in your phone’s About settings. Devices sold in different regions can have different SIM options, even when the retail name is the same.
- Check whether it’s unlocked. On iPhone, open Settings, then General, then About and look at Carrier Lock. “No SIM restrictions” means the phone is unlocked. On Android, the process varies, so confirm the lock status with your current provider. Apple’s carrier lock guide
- Confirm compatibility with the new provider. An unlocked phone can still lack support for a provider’s network or SIM setup. Use that provider’s official compatibility checker when it’s available.
Pulsar Wireless’s device compatibility and activation options are still in development. This site does not collect device identifiers or confirm eligibility.
How to prepare for a number transfer
Moving a number between providers is called porting. Keep your current line active while the transfer is in progress. Start the transfer with the new provider after it confirms it can accept your number. FCC information on keeping your number
Check which account details the new provider needs. You may need the name on the existing account, the account number, the billing ZIP code, or a number transfer PIN from your current provider. Enter these only through the receiving provider’s official transfer process.
After the transfer, test a call, a text message, and mobile data on the new line. If you have other lines on the same account, check their status with the previous provider before closing the account.