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.
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.