Updates cannot be refused. If you root your device and reflash with an old version, you will find the updater is extremely aggressive and can't be disabled. On

Updates cannot be refused. If you root your device and reflash with an old version, you will find the updater is extremely aggressive and can't be disabled. On top of that, once a device has had XE16 installed on it, XE11 (the last version that I found acceptable) and earlier versions are rendered unbootable.