Hi, a few days ago I had some issues with my iPhone 6 and Apple gave me a replacement unit. Now, when I wake up and get my phone (left it charging over night) it starts doing weird things.. First, the Wi-Fi logo stays gray (like when you have no signal) and wont go away if you turn it off through the control center. Then if I try to open Settings, the app freezes on the white splash screen and never opens, if I try going back and opening another app nothing happens, the app's icon gets gray and thats it (see when you touch an icon how it gets gray for a millisecond, it stays like that). Turning off and on the phone doesn't solve this, it turns on again, it does some weird graphical glitch when I open the control center for the first time and then it continues to fail to open any apps. After restarting, if I lock the phone and try to unlock it it will show the desktop background (not the lock screen one). A hard reset solves the issue and it only happen twice (in the last 2 days) after leaving the phone plugged all night. I don't know if it's a software or hardware issue.. I sure hope it's a software issue because I'm abroad and wont be back in the states for at least a month. Now I will try to back up my phone, do a fresh iOS install and restore from the backup.. Lets see how that goes.