IPhone 4 (7.1.2) - Wifi not connecting if distance to router is more than 2 meters

Hi -
Please help me with solutions or suggestion with the wifi connecting problem I have with my iPhone 4.
Currently my iPhone 4 is on Version 7.1.2. Till last week, it worked really fine and used to connect to wifi router from around 20-30 meters distance also.
But suddenly it is not able to connect through with little distance over 2 meters. Not sure what went wrong. I tried Network reset also which did not helped.
To mention here, around 2 weeks back I had an issue with charger and it caused phone to heat to some extent. So I replaced the charger and everything is fine.
I tried freezing also which did not worked.
Currently wifi is working and showing up network only within 2 meters range.
Please help me with the solution
Thanks
Giri

Hi Giri,
Based on your description of the issue and what may have happened to your iPhone around the time the issue started, you may need to have your iPhone evaluated or serviced. You may find the following page helpful:
Apple - Support - Service Answer Center
Regards,
- Brenden

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IPhone 4 (7.1.2) - Wifi not connecting if distance to router is more than 2 meters

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