AT&T

(T) - Get Report

and

Apple

(AAPL) - Get Report

said there will be three service plans available for the much-anticipated iPhone when it's rolled out later this week.

The plans will start at $59.99 a month. All three will include unlimited data, Visual Voicemail, 200 SMS text messages, roll-over minutes and unlimited mobile-to-mobile calling.

The iPhone will go on sale Friday. There are two versions, one for $499 and the other for $599. The $59.99 plan will give users 450 minutes. More minutes will be available with monthly $79.99 and $99.99 plans.

Separately, the companies said users will be able to activate their iPhones using Apple's iTunes software running on a PC or a Mac from home, without having to wait in a store while their phone is activated.