My friend just updated her Victory to JB and something went wrong, and now her phone is laggy as hell. I had her factory reset, but it did nothing and her phone is still laggy. What's the best way to fix this? She doesn't care much for rooting, she just wants her phone to run smooth again. I have experience with using Odin and can guide her, but I just want to make sure I'm going about it correctly. Should I have her flash back to ICS via Odin and do another OTA update, or flash the JB stock image via Odin? If she's not going to root, you can just flash the .tar image in Odin and reboot right? Thanks for any help.