The biggest selling points of the Nexus are that its unlocked and sold for an unusually low price for a top tier phone. After tax and shipping, youre looking at about $380, while the GSM Galaxy S3 and iPhone 5 are $650 outright before any taxes or shipping. There are many providers out there that are resellers of AT&Ts and T-Mobiles services, and most times offer their plans lower than the associated carriers. There are many out there to choose from. Red Pocket Mobile , Straight Talk, Simple Mobile, Net10, and Solavei. You can even go right to the horses mouth and get service. The prepaid plans are cheaper than the contract plans, since youre not covering the remaining cost of a phone for 2 years.