Sorry,I'm Chinese so my English not well. This method not make sense for everyone. 1.6X version PS Vita install TN-V make custom bubbles(use TalkmanTravelTokyo),1.6X PS Vita Activate by PS3. And then format this system,DON'T FORMAT THE MEMORY CARD. Then SEN account, set Yes,I do.Sigh-in ID(New ID). Then we can see are on the PS Vita now. Backup 1.6X version PS Vita by CMA, and then Restore to the 3.36 version PS Vita. Done.