Tag Archives: t-mobile

What can you do when your phone displays Invalid SIM Card after Permanent Unlock using T-Mobile Device Unlock App You might find yourself in the situation where your T-Mobile USA phone will display "Invalid SIM card" after Permanent Unlock. The...

Device Unlock App Error types and significance There are some cases when the Device Unlock app will return an error message. Depending on this message there are several steps that you can perform to move past these errors. We will...

What to do when your Samsung doesn't ask for the unlock code? First thing, DO NOT worry There is one thing you can try when your Samsung doesn't ask for the unlocking code. Some require you to already have the...

Not sure if your phone is Network Locked to T-Mobile USA? Find out! You can easily find out if your phone is Network Locked to T-Mobile USA., First thing you’ll need a different SIM card (from a different network provider...

If your phone displays the message 'This device can be remotely unlocked if eligible. Please use the Device Unlock Application to unlock the device' after you insert a non-accepted SIM card, then your handset is locked to Metro PCS or...