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If you're planning on switching from AT&T to Verizon on Thursday and getting a redesigned and new iPhone 4, there are a few things to consider that could affect your finances: where to sell your old iPhone for the best price; how to erase your data so someone doesn't use it; if it's worth...

Verizon is allowing some AT&T customers to trade in their iPhones for credit when they buy a new Verizon iPhone 4 and sign up for a two-year contract, although the trade-in value isn't as much as they'd get by selling their old phones on the secondary market. A quick glance at Gazelle.com,...

With a $325 early termination fee required to get out of a two-year iPhone contract with AT&T, making the switch to Verizon when it starts selling the iPhone 4 on Feb. 10 can be painful for current iPhone owners. But if iPhone owners act fast -- this week is probably best -- they can sell...

Standard & Poor's lowered the credit ratings for AT&T and Verizon Communications on Monday, saying that increased competition will make it harder for the two largest phone companies to pay down their long-term debt.

T-Mobile USA warned that plans to introduce new high-speed mobile technology could go badly wrong for consumers and companies. Verizon Wireless (VZ) is currently working on a high-speed service for the end of this year, Reuters reported. The service will be based on an emerging technology known...

AT&T said Friday it will target enterprise customers with direct iPad sales to customers whose cellphone bills are paid by their employers. The company will offer all three iPad 3G and Wi-Fi models starting Oct. 28.

Almost one in four users of Apple's iPhone would switch to Verizon from AT&T as their cell phone carrier once AT&T's exclusive agreement with the iPhone expires, Information Week reported Tuesday, citing an analyst note from Credit Suisse Group analyst Jonathan Chaplin.

AT&T, Verizon Wireless and Sprint-Nextel want to protect themselves against the iPad and the power it brings Apple in the wireless marketplace. Case in point: Samsung Electronics will launch its new Galaxy Tab tablet soon and all three telecoms will market it.

After months of talk, Dell brought its Aero smartphone to the U.S. on Tuesday. The Aero uses an older version of Google's Android operating system called "cupcake." Will it prove to be stale -- or still a treat?