WASHINGTON (MarketWatch) -- AT&T Inc. and Verizon Wireless Inc., fierce rivals in the mobile-phone business, have agreed to swap territories in four states to help pave the way for federal approval of ...

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 ...

AT&T has launched a new security feature called "Wireless Lock" that protects customers from SIM swapping attacks by preventing changes to their account information and the porting of phone numbers ...

AT&T said it will buy the Alltel assets that Verizon Wireless needs to shed, and Verizon will buy some assets from AT&T's purchase of Centennial Wireless. Marguerite Reardon Former senior ...