Q: Iphone 6plus opens app and types like it's possessed

Hello Akitheya,

I have not experienced my iPhone randomly doing things on its own but wonder what is happening with yours. I understand that just letting it set there it randomly acts like you are touching it, opening apps and typing and such.

I'm not sure by resetting if you mean restarted, or hard reset but please check out this article.

If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch - Apple Support

You may also want to try a backup and restore to insure it's not a software issue.

How to back up your devices using iCloud or iTunes - Apple Support

Use iTunes on your Mac or PC to restore your iPhone, iPad, or iPod to factory settings - Apple Support

Take care.