my reception signal for phone calls is really bad. 90per cent of the times people can’t here me or I break down and need to run upstairs where it seems like is a bit better. Don’t understand why is like this, is been for months now, but before it was not the case, and I even have a better phone now. I was with 3 for years before and I never had this problem so I don’t understand what it is and if it can be fixed. Any suggestion, help?