So, I was gifted an Amazon Kindle Fire 7 (7th Gen) a few days back. The tablet seems to be very locked up. I mean, the launcher cannot be changed, there's an ad on the lock screen and the settings menu doesn't have all the options in it. I could somehow install Play Store and change the launcher from an app I found on XDA. But I want complete customization. Perhaps installing a custom ROM? But this tablet also seems unrootable. But there must be some way through right?