I live in central London, UK (you can assume signal strength is pretty high here). Obviously I've also used my phone plenty of other places. In daily use I've n

I live in central London, UK (you can assume signal strength is pretty high here). Obviously I've also used my phone plenty of other places. In daily use I've not noticed any call or data issues with either the 3G or 4. Not that I've been looking for any, especially Having just checked, seems I can drop my bars down from 4 to 3 by putting my thumb across the famous gap.