So, problem, and I'm not sure how to diagnose or fix it - my Galaxy Note 4 has suddenly become extremely unresponsive. As in, within the last 12 hours. Everything is slow to the point of rendering the phone unusable. Example - I'll press the power button on the side to turn off the screen, and the phone will hang for a good 30 seconds until the screen turns off. It takes minutes to actually dial out. I have the S-window cover for the phone, and when I close it, it takes about 15-20 seconds for it to even register that it's closed. When I open it, it takes another 15-20 seconds for my phone to register that it's open.
All these times where it's taking 30 seconds, 15 seconds, 20 seconds, etc - my phone is entirely unresponsive. I can't do anything. It's also been rebooting randomly, and when it boots, it takes minutes to fully boot up.
Shit, even checking text messages - press the text message button, it hangs for 30 seconds. Pull up the text message I want to view, hangs for 30 seconds. Try to scroll - hangs for 30 seconds. I type letters on the keyboard and it hangs for multiple seconds between key presses.
I've tried taking out the batter. I've tried killing all processes. I dont visit shady sites on my phone, I don't open weird emails, I don't really do anything with my phone beyond communicating - is this a virus somehow? How do I begin to diagnose this problem? Any ideas on how to service my phone? Is there a way to format and clean install everything?
Had the phone for a couple of years now without any problems. I also still have my Galaxy Note 2 and that still runs fine. I tend to take care of my stuff. This stuff started happening last night right before I went to bed - woke up and now it's even worse. Any help?