One common issue that some users face is their new phone not accepting their SIM card, requiring an unlock code. We will cover various methods to obtain the unlock code and troubleshoot your SIM ...

To check if your Android phone is unlocked, try swapping in another SIM card or test your network settings. If calls work, ...

After you obtain the unlock code, you install another network's SIM card, power on the phone and then enter the unlock code when prompted.

This extra layer of security prevents someone from using your SIM on any phone without knowing your SIM unlock PIN. The reason for activating a SIM card lock is due to SIM phishing.

How-To How to unlock an iPhone and use any SIM card Is your iPhone locked to a specific network or carrier? Here's how to break free and unlock your iPhone. .

Following successful entry, you enter a new PIN code for that SIM card and the phone will unlock to your homescreen with full access.