yahmegaman said:
HI. well i backed-up my nand through bootmii and i was wondering can i update my 3.2U to 4.0U via nintendo update, and if i want to go back to 3.2U can i restore it using my back-up nand? Thanks.
Yes, that is possible. Bootmii will survive the update and can restore your 3.2 system. Just one little thing: the nand backup is the full memory, including everything. So if you've played games and saved after making the backuo, you will lose that progress and get the old saves back. If you want to prevent that, copy your saves to sd before restoring 3.2
And thanks to bootmii's safety, you can even use Waninkoko's 4.0 updater without any risks.