How much a month is an iPhone 5 from tmoblie?

My phone company is tmobile and I still have a blackberry but I really wanna upgrade to an iPhone 5. Paying for the actual phone isn't what concerns me because thats just a one time payment, it's how much I'm going to have to continuously pay every month. How much per month is the data plan thats required to have the iPhone 5 under tmobile?

With insurance it is $77 and some change. With out insurance i believe is exactly 70. But i really recommend the insurance

The insurance isn't all that necessary unless you're clumsy and will likely break you phone in a way apple won't replace.

I have 2 lines $40 each plus $10 for 2gb internet so it comes out to $50 per line on an iphone 5. Its really cheap considering how much other carriers charge

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