On January 20, 2015, I purchased an iPhone 6 Plus. Within two weeks a new Sim card had to be installed. For the last month, intermittently, two things have been happening.
The first, while talking on the phone, I will hear half a ring and another person will be automatically connected and I will lose the conversation with the first person.
The second problem I am experiencing, is being in any app whether that be Facebook, calendar, contacts, searching the web, etc. the screen goes black and usually within a few seconds I'm back to the main screen. A couple of times I have had to push the button at the bottom of the phone in order to return to the main screen. Either way, I have lost whatever it was on which I was working.
Please advise. Both of these are most annoying and troublesome.
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As much as it my suck...I'd try a factory reset...just to make sure you don't have any issues with software. SIM card replacement is typical on an iPhone so no a huge area of concern. But if this continues to happen I'd be making a trip to the Apple Store...