Hello,   Until recently I had no problem but since around a week or so ago I can't make or receive calls to my sim in my phone although switching it to my wife's phone it can do so fine and I can receive calls from my sim in her phone to her sim in my phone.... all a bit confusing. When the sim is in my phone, there is no dial tone when calling until it just drops the call. In my wife's phone, dial tone and making calls with no issue.   I have restarted my phone, changed sim slots and now when I go in to the sim settings neither sim is set for calls and I can't seem to select one. My phone is an Android.  Any help or insight would be great, thanks ... View more