Originally Posted by dunca123
Yes, but usually you want to do a factory reset deal with it, before and after flashing to new ROM. If you have a Nandroid backup, all you have to do is an advance restore and restore your previous data without all of the hassle.
Factory reset prior to flashing a rom would be enough in my experience... but I guess after wouldn't hurt either... your preference and time...
SG Note II - JB Stock
Captivate - AOSP JB
Touchpad - OaT LnT JB
Galaxy Player WiFi 5.0 INTL - Eryigit KPA GB Rom - Rls 3.5
Galaxy Player WiFi 5.0 INTL - CM10 Nightly
Galaxy Player WiFi 5.0 US - CM10 Nightly
Streak 7 - ICS -B4 CM9
Dinc 2 - GB Stock
AspireOne NetBook - Windows 7/Windows 8 Pre/Ubuntu/Android X86 (ICS)
Logitech GoogleTV - HC 3.2
Nexus 7 16GB - JB Rooted
Xperia Play R800X - GB