US Cellular is offering buy-one-get-one free deals on all Android devices, including the Galaxy S smartphone. Two of US Cellular’s Galaxy S Mesmerize, will cost you $149.99 after an $80 mail in rebate. The usual two-year plans are required including a data plan. The two-for-one offer is available through February, 17th, although the $80 Mesmerize mail-in rebate appears to be only valid until the 13th.