The Samsung Vibrant is a phone manufactured for T-Mobile in the U.S. When you purchase this phone, it will have a carrier lock that prevents you from using this phone with a non-T-Mobile cellular ...

T-Mobile subscribers are facing issues with SIM activation due to a widespread outage. Users are unable to make calls, send texts, or connect to the internet after activating a new physical or eSIM, ...

If you've just got your hands on a shiny new Sim card, congratulations. Switching your Sim (the chip that dictates your allowance) can unlock huge savings. Now comes the crucial step of activating it ...