Hi, am experiencing really strange issue. I live in countryside and my signal is great and stable all day long, but when I go to town my GSM signal drops to zero. No matter if I have data enabled or disabled. The phone is constantly searching for networks, when find it (sometimes doesnt for hours) tries to connect but always disconnect from it after two or three seconds, and all process goes again, still trying to connect. This is not local problem as same thing is happening in other town. Today I went to Kells (Co.Meath) and my signal was dropping really bad, however I had signal for 30% of time there and was able to use internet as well for short time = all this was happening 100 meters from GSM transmitter in center of the town! 

I have got new simcard from 48 as the first thing I would change, but no luck, still the same so far. I will be going there tomorrow again with my second phone to try with my simcard and will see how it goes.

Anybody have this problem as well?