No, the cause of missionary break downs is being shoved into an environment where you are made to feel like shit unless you can shove religion down others throats and LIE ALL DAY EVERY DAY to everyone and put on a huge happy face, constantly on stage saying how great everything is when really you are dying on the inside.
Yeah, it was bug me to have to give up my smartphone, and I don't even know how to use all its potential...
But from what I've read, each companionship has a mission-issued phone, with texting capability, so they may have some sense of their former connectivity. But it's a pale imitation...
How many elders and sisters sneak a phone in so they can stay in touch with the real world? Based on the way I misbehaved on my mission, I would have probably sneaked a phone into my coat pocket.