[Q] Z3 restarts every few days usually over night...

[zlays]

So I have this problem and I was wondering what could cause this...
I have two phones with same number,I carry one to work and Z3 stays at home...
When I want to activate one of them I just make a quick call or ring from the phone I want to use and that one becomes active...
I was wondering can this use of same number on two sim cards cause random reboots of my Z3...