Why is my service so slow on iPhone 4s?

I jailbroke my iPhone 4s a few months ago and everything is fine except my service. I always lose service or its really slow anywhere ago. I have AT&T and I've always used them but for some reason now the service is getting really bad. Is it because I go on the internet a lot? Should I just wait a couple months and wait till my data comes back or should I unjailbreak my iPhone?

It might be a problem with the jailbreak tool used, i had SEVERAL glitches when i jailbroke with evasi0n… I would suggest to unjailbreak and then rejailbreak but there's ios 6.1.3 or 6.1.4 for iPhone 5 so it won't be possible sadly:\ i suggest taking out your sim card and restart your phone but other then that you might just have to unjailbreak completely:\ best of luck tho ^.^

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