Google Nexus 5 :: Phone Won't Receive 3G Or 4G Network Signal

A day ago i came through a issue with my nexus, as i connected my charger to the phone, the phone went into a bootloop and wouldnt get into recovery,fastboot,bootloader mode the fix i found on some thread on xda was to remove the back panel and then reattach the battery circuits. This worked exactly as described the phone booted properly.

But since then my nexus wasnt switching to 3G signal, i wasnt sure if it was my sim/operator failing to provide signals, finally after a whole day returning from job i realized that its my nexus thats not connecting to 3g and not the sim operator as i tried using my sim on my mothers phone.

I couldnt find any fixes on the internet and so I went through the internal hardware specifications and from ifixit i learned that reconnecting the antenna wires solved the issue for me.