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Hey don't go for cheaper one but my sisncere advice is to go for Nokia you may ge for Rs.1900+ also

It all depends on what you're looking for. The big carriers are AT&T, Verizon, Sprint/Nextel, and T-Mobile. They all have advantages and disadvantages. Shop around, find what you need, and who meets your requirements best. Most companies when you sign the contract for the plan, you get a discount on the phone (lots of times results in a free phone.)