What's the reason to rejected.? Can avoid it forever
but you can delayed..just Goto Settings >>Software update
>>uncheck-Download Updates Automatically
Also when you receive the Update notification, don't installed
but don't know if can be Turn off: The notification only
offer the options [Install now] or [Later] it appears as
number "1" on the Settings icon..Anyway you'll
get soon other replies to decide
You can disable the system update service via the PC program Debloater and ADB. A quick Google search of how to disable system updates using the program should show you what processes to block.
Well here it is. Woke up this morning finding the update being pushed to my phone. Now every morning I have to delay it. Frustrating that you can't just opt out, and manually update of you want.