Originally Posted by TPS_Reports
Can I assume I would need to wipe data/factory reset, etc. before I restore the backup?
Sent from my VS980 4G using Tapatalk
So, that depends on what your starting config is, what you upgraded to.
For instance, if you are stock and flash a ROM using the stock recovery, then likely yes. You should and you would use the stock bootloader to wipe with.
If you have loaded a new recovery (TWRP, CWM) then read(!) the instructions on the developers page. My example is that on my tablet, once I upgraded to TWRP, I SHOULD NOT use the factory wipe option as that would wipe both TWRP and the backup files. That would cause lots of problems so, don't assume.
Typically, you do need to data/reset/wipe prior to flashing a new or recovering to an old ROM, just be careful what/how you do it.