Have you ever gotten a new phone only to find out it’s locked to a specific carrier? This often happens when you purchase a subsidized phone from a carrier. The carrier locks the phone so you can’t ...

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After you purchase and use your cellphone for an extended period of time, you can change networks. However, the phone that you're currently using may not be offered on that network. If you wish to ...

Do you get the error message “No SIM Card Detected” or “No SIM Card Installed” after inserting a SIM card into your phone? This problem often occurs when you ...

It was discovered on Friday that AT&T is dedicating the new multi-carrier Apple SIM included with the iPad Air 2 and iPad mini 3 to its network, forcing buyers to obtain a new one when switching to ...