Network loss for iphone 4

im using iphone 4, ver 6.0. i always encounter network loss problem. i use to reset network for temporary solution.Kindly advice.

Ali Mostoufi wrote:
Thanks.
Ok but very expensive in other country? You have a 2 choice in US, first buy with AT &T with low price and the other buy from store without AT &T 650$ the second way is locked? What is different between 2 ways?
the difference between the 2 is one is a subsidized price with a contract of 2 year commitment. Which is locked to AT&T.
the other one is the no commitment, which means it is still locked to AT&T but that you don't renew your contract that way.
Either way All iphones in US are carrier locked to AT&T and it can not be unlocked at all.

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