I did a search and got no results. If this is a duplicate, please pull.
Not a duplicate, thanks.
Although it is possible to make calls from aircraft...the physical nature of a cellular network makes consistant success in calling unlikely.
The network is designed to pass a mobile user from one cell to the next....once the aircraft is at altitude the computer that passes off calls will become confused because it is not expecting a call from overhead...the signal strength will appear to be equal at several "receiving" cell towers....hence the likelyhood of dropped calls is raised significantly.
In landings and takeoffs (lower altitudes) I see no problems.
I worked for a major cellular provider for a number of years.