As new iPhone and iOS are coming soon, do you want to selling or buying a used phone? Check if your Apple device is in the model list.
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iPhone always gets an alert that says "SIM Not Supported" and cannot be activated.
The iPhone prompts "SIM Not Valid" when you inserted a new SIM card.
Restricted by the service provider, You can’t switch between Verizon or AT&T.
Troubled by GSM carrier when making travels internationally.
If your iPhone has not paid off the contract, you can still use SIMUnlocker to unlock your iPhone. Once unlocked, you can change to any different carrier.
All you need is a WiFi Internet connection and the SIM card of a different network carrier. If you don't have WiFi, you can connect your PC to iTunes using a USB cable. iTunes will connect to the servers at Apple, applying the unlocking for your iPhone.
No, your iPhone will be permanently unlocked. Even if you restart your iPhone or change the carrier’s SIM card and it won’t be locked again.
Very easy, you only need to insert a new SIM card from the different carrier, if your iPhone can automatically detect the carrier and there is a network signal, it means that your iPhone is unlocked.