How to Unlock Your Phone From Any Major Carrier You can switch to another wireless provider without buying a new phone. Here’s how.

And we’re not talking about your phone’s passcode to access the home screen — we’re talking about the network unlock code. This is the code that allows you to take your phone on network ...

In network settings I see a code of er05 invalid sim. This is apparently related to WiFi calling, which, in turn, is most likely the OS T-Mobile has installed. Could the OS also affect the sound ...

The network unlock code you get will only work for the device that you provided the information for. Keep in mind that you have limited attempts to successfully enter an unlock code.

Cellular carriers lock their networks on the iPhone you buy from their store or pay for via installments. Here's how to unlock your iPhone to switch carriers.

Got your hands on a Galaxy S3 but it's locked to a different network? You need to unlock that beast. Here's how.