How to activate 3G on an iphone 4s?

I got a new iphone 4s today I charged 3G and I spended 19 $ (alfa) but it won't work how to make it work?

Well, 3g comes with the 4s, but to activate it you need to make sure that:

A) You have paid for the 3g service plan through your carrier
B) Your phone isn't already connected through the 3g service

If you have any specific questions, call your carrier or go to an apple store.

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