Verizon has been stealing attention away from the iPhone’s¬†original carrier, and it looks like AT&T is doing all it can to keep disgruntled customers from jumping ship.

500,000+ Verizon iPhones have already been¬†pre-ordered, and the device just became available for purchase on Apple’s site.

Needless to say, AT&T is¬†definitely¬†feeling the heat from its new competition, and it’s doing everything it can to ensure that customers don’t cross over to the dark side…

First, AT&T started secretly offering¬†unlimited¬†data plans (that were¬†supposedly¬†discontinued) as on option for customers. Then the company offered an extra 2GB of¬†tethering¬†data for free. Now it appears that AT&T is making its “Mobile to Mobile” calling feature universal.

MacRumors reports,

“In what could be viewed as yet another bid by AT&T to keep customers from defecting to the Verizon iPhone, the carrier today¬†announced that it will launch tomorrow a new “Mobile to Any Mobile” feature allowing unlimited calling from AT&T phones to other mobile phones in the U.S., regardless of carrier.

The feature, which rolls out tomorrow, requires customers to be on a qualifying voice plan and to have an unlimited messaging plan, which costs $20 per month.”

You can enable this new perk on your AT&T plan by visiting tomorrow. Remember, you won’t be¬†eligible¬†for “Mobile to Any Mobile” if you don’t have an unlimited messaging plan.

While it’s nice of AT&T to offer these deals to customers, it probably won’t make that big of a change to the people who have waited for their contract to expire so they can switch to Verizon.

However, if you are an AT&T customer, be sure to take advantage of this offering and get free voice between any two mobile numbers.

Does this news from AT&T seem like a plea of desperation? Perhaps they just want to give us the assurance that our dropped calls will be free now.

[via MacRumors]