I cannot remember when last I had a dropped call, then again, I'm never on a call while mobile. If you are in a fixed place like outside or in a building, dropped calls should not happen. If you are moving around, especially in a building the signal strength can be effected by many things out of the control of the operator. So, rule of thumb, want to make or take a call, relax, go take a seat, have a cuppa. Life’s too short to be rushing from one place to the other. If driving, turn onto silent, put some music on, calls can wait till you are back in the office. No dropped calls and not frustration.