I’m having problems with making and receiving calls. It’s hit and miss if I get a connection making or receiving calls. When I go into the contact details it’s a blank screen, it’s the same when I go through the call icon no details show. If I’m lucky I do occasionally get to receive and make calls and the contact details appear on screen, but I’d say 8 out of 10 times it doesn’t. Aghhhh! I’m pulling my hair out with frustration. I’ve had this phone for 6mths now and this has just started to happen. I’ve googled and tried the obvious and checked it against my partners phone who has the same one, all the settings are the same barring a few different apps. What I have noticed recently is a small icon System IU appears when I first power up it disappears once the phone is on. I’ve reset the settings but not done a factory reset just yet.