While the $99 offerings from Verizon and AT&T let you yak it up with as many minutes as you'd like, T-Mobile's plan adds as many text messages as your fingers can handle. Sprint is taking the unlimited concept several steps further, because their new $99 unlimited plan really does include everything - an unlimited voice, data, SMS messages, email, Web, Sprint TV, Sprint Music, GPS navigation, DirectConnect and Group Connect. The plan is called Simply Everything, and is available to both CDMA and iDEN customers. Customers will be able to switch to the new plan without extending their current contracts. Sprint will also offer an unlimited everything plan for family lines as well for an incremental $5 discount for each additional line. Interested customers can contact customer service or their closest participating retail location. Simply Everything will be available to existing and new customers beginning tomorrow, February 29.