Activate a cellphone that is currently inactive to begin using service on the device. Two types of cellphone technology exist: CDMA, or phone that don't use SIM cards; and GSM phones that do. The ...

Verizon appears to be incentivizing consumers to make purchases online rather than at one of its brick-and-mortar retail stores, as CNET reports that the mobile carrier is lowering activation and ...

Call forwarding allows you to redirect calls to a different number. When you're unavailable or left your phone at home, you can forward calls to a partner, assistant, or office number. Though you've ...

Apple says the issue may stem from having an inactive SIM with the same number as your active SIM. To fix it, remove the inactive SIM and activate iMessage again.