How to fix glitches on my iPhone 5?

I got the iphone 5 two months ago and the past few days the Wi-Fi has been going in and out and I have been getting service. What should I do? My iPhone 5 is on the ios6, would updating to the ios7 fix this problem? My other devices isn't having this issue with the internet.

If it is connecting and disconnecting from Wi-Fi then it might not be your phone, it might be the Wi-Fi you are connecting to. Does this happen at every Wi-Fi you try to connect to or just one in particular?

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