There are choices on the market if you are looking for prepaid options from Sprint (S). The carrier offers no-contract plans through two subsidiaries, Boost Mobile and Virgin Mobile, and also has roaming deals in place with Republic Wireless, which provides $19-per-month unlimited service. According to alleged internal documents obtained by AndroidPolice, Sprint may be looking to enter the prepaid business itself and offer self-branded no-contract phones to consumers. The carrier will reportedly offer unlimited talk, text and web for $70, however there are a few catches. The prepaid service isn’t available with most Sprint smartphones such as the Galaxy S III and is only compatible with two 3G handsets: The LG (006570) Optimus Elite and Samsung (005930) Victory.