HT1976 Iphone 4s signal dropping to no service

My iphone 4s giving me no service
I have to restart phone every 5 min
When I restart i get full signal and after few second It start dropping and stop on 2 bar and after few more seconds it give no service.
What cloud be the issue ?
Its hardware (if its hardware what component I need to change or repair.
If its software then what is the solution.
I am in Pakistan and here we have no apple store or genius bar facilities.
Help me to solve the issue otherwise iphone is non useable at the moment.
I need quick reply from Apple team.

If you have tried a restore as new expecially in DFU mode you have done all the software troubleshooting neccesary this narrows it down into a hardware issue.
Apple does not recommend doing any repairs on your own because it will void your warranty however
You would be looking into repairing your Signal Antenna
Before doing this repair i would suggest contacting your carrier and having them reset your cellular network just in case
Good luck
Let me know how it goes

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HT1976 iphone 4s no signal

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1-2 hours i think (im not sure).
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But i have a feeling that this is because of the apple's updates? Because it all starts when i update mine to 4.0.2-4.1.0
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As far as I know I don't have any issues with the signals.
Yesterday I unplugged my iphone at 7 AM sharp, at 10 PM, I had 83% remaining so I decided not to charge my phone, so I put it on airplane mode close all my apps on the multi-tasking bar and I woke up this morning and it was still at 83%. So my battery did not drain overnight. Right now it's 4 PM where I live, and my usage stats reads 2 hours 58 min. and a standby time of 1 day 9 hours and my battery % is at 53. So from the time I woke up till now I only lost 30%. Normally I check my phone every hour.
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I would suggest doing the same, connect to itunes, sync, hard reset and recharge, this surely helped improve my battery life. If this doesn't fix for you, then try full restore and see if that does any help.

HT1976 Iphone 4s signal dropping to no service

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