SEATTLE — For as long as I can remember, wireless phone companies have offered sizable discounts to customers who agree to sign up for automatic bill payments—typically $5 to $10 a month per line.

I lost my wireless Internet card, so I went to a store in New Mexico, where I was in the military, to obtain a new card. The representative said the card would cost $80. I told him my contract was up ...

AT&T is rolling out a protection that prevents unauthorized changes to mobile accounts as the carrier attempts to fight a costly form of account hijacking that occurs when a scammer swaps out the SIM ...