Sprint is offering the Motorola X with Sprint’s Unlimited Guarantee. This guarantee promises customers unlimited talk, text and data for the life of the line of service. The biggest catch is that you have to be connected to Sprint’s network to take advantage of the unlimited connectivity. The flagship phone from Google and Motorola will cost $199 with a two-year service agreement. It will be available in woven black and woven white with a 16GB storage option. New customers who switch to Sprint get an extra benefit — they’ll get a $100 instant discount, bringing the final price to $99.