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 ...

Your SIM card is far more important than you probably realize. It's not just the chip that is assigned to your phone number and contains crucial network authorization data. It can store contacts and ...

If you’ve bought a cellular iPad from someone other than Apple, you may later find that the iPad is locked to a particular network. If you insert a SIM from a ...

Apple had good intentions by equipping its cellular-based iPad Air 2 and iPad mini 3 with SIM card options, thereby giving owners the flexibility to choose from a variety of short and long term data ...

1) a Straighttalk iPhone SE (carrier locked) that came from the carrier with a Verizon-tower SIM card. 2) a Straighttalk ATT-compatibe SIM card. I would definitely assume so. The phone might also have ...

Apple's new Apple SIM card in the iPad Air 2 and the Retina iPad mini 3 is designed to be universal, usable across a variety of wireless carriers in the US and UK, including AT&T, Sprint, T-Mobile, ...

Despite Apple's claims that the iPad would ship unlocked, allowing owners of the 3G model to access any compatible wireless data network they might choose, the device is locked to carrier Softbank ...

Every smartphone is either locked or unlocked, depending on where you buy the device from. When you acquire a new mobile phone directly from a U.S. carrier like AT&T or Verizon, it will be locked to ...

(Subscriber Identity Module lock) A function in GSM cellphones that restricts the phone's use to a particular cellular carrier identified by a SIM card. SIM locks are used to ensure subscribers finish ...