My SGS2 is dropping it's network connection multiple times a day without any notification. The signal bars disappear and it just says NO SERVICE/VODAFONE NZ. No data, no 3G, no 2G, nothing...

I was previously on Gingerbread 2.3.6 and was hoping that CyanogenMod would fix the issue. I flashed it to CM 10.2 but the same issue remains. This makes me think it is a hardware issue and not a software issue, however it did not wipe my internal SD card - could there be settings in there that are causing this?

It seems to really love the ground, so I'm wondering if it has just been dropped one to many times and cracked some solder connections somewhere internally?