Default No reception after removing the back cover of HTC One x

Hello,

I am using a HTC one x unbranded. I have recently removed the back cover just to look inside(i know i am stupid, Shouldn't have done that).

But anyway after placing the back cover safely and cautiously i can't seem to get my sim card registered (which i used before perfectly in this phone ) due to poor reception in my opinion.

The other thing is when i go to the city where the network tower is located my phone seem to be working fine. better reception.

I have tried many things. I looked inside the phone again to make sure i haven't damaged anything and also tried a different sim card and i did reset the phone as well. Nothing seemed to help me so far.

Any suggestions will be highly appreciated

Thank you
Mahesh