If you have a SIM card PIN enabled on your phone to access data on the SIM card, but you repeatedly enter it incorrectly, the SIM card may lock you out from further attempts. You can reset the SIM ...

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 ...

If you want to take your Galaxy S10 and use it on any carrier network, you’ll have to do a SIM unlock first. In this guide we’ll explain how to SIM unlock the Galaxy S10 or Galaxy S10+ and why you’d ...

In this guide we’ll show you how to SIM unlock the Galaxy S9 so you can use it on different carrier networks. That way if you bought the Galaxy S9+ from AT&T, you can still take it to T-Mobile if you ...

Unlocking phones from them can take time but we have a guide to help you. Pictured: A Sprint cell phone company logo is seen on a store in New Carrollton, Maryland, December 31, 2014. Getty ...

In this edition of her advice column, CNET's Marguerite Reardon explains the differences between locked and unlocked phones and helps a reader figure out how to get an unlocked device. She also ...