Iphone 4s wifi problems and frequent crashes post 7.1 update

Hello!
I have an iphone 4s for about a year now.
After updating to iOS 7.1, I experienced frequent crashes and intermittent wifi connection inability (wifi button greyed out).
I have reset my phone 2-3 times to factory settings but the problem is still there.
Frequent crashes and intermittent wifi connectibility. (Mostly absent)
The phone was working perfectly until I upgraded to iOS 7.1.
Is there a 4s wifi patch or a new iOS update (7.1.1??) coming out??
Please let me know, this is very frustrating!
I am a doctor and sometimes I am on call. Having an unreliable phone (I sometimes find it frozen or turned off), is not an option for me.
Thank you very much

Try the suggestions here to see if they resolve your problem:
http://support.apple.com/kb/ts1559
If these don't work you may have a hardware problem. Visit an Apple store for an evaluation or contact Apple Support.
Contact Apple: http://support.apple.com/kb/HE57

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Iphone 4s wifi problems and frequent crashes post 7.1 update

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