My Nexus 4 shutdown randomly? I'm living in India. Last year I bought my Nexus 4 in the US.

For a couple of months now my device is getting quite hot, and shuts down randomly. I have done a factory reset 2 times, but no use of that: the shutdown continues.

This mostly happens when I'm on 3g, but not when I lock the device to 2g. The problem started about 5 months after purchase, so it didn't exist from the start.

Has anyone experienced this issue? Can anything be done to solve it?
its an hardware issue because of network kernal...
When I replaced the board and now the phone works fine.