Ive had ATT for a very long time. recently i bought a new phone x and put the sim card into it. now I cant switch sim cards on the phone because it hasn't been 6 months since i put the chip into the device. how do i rid my device from the deathgrip of ATT and switch to T Mobile, and how to i swtich

I'm an existing post-paid customer paying $157.80 per month for two lines of service ($1,893.60 annually). 1 line with Data Unlimited for 4G LTE ($45.00) and the other with DataPro 3GB for Smartphone 4G LTE($30.00) data plans. Our peak usage since the first of the year has been 22.2 GB in

Hello! I really want to leave positive feedback for a technician who helped me twice this week with different issues about my net connection and hardware. This technician really deserves to be praised for the way he solved my issues so quickly and how he's such a cool person who brought positive vib