Board Thread:Questions and Answers/@comment-28153375-20161212145126/@comment-28010522-20161212151217

well, unless someone else knows another solution to the issue you experienced, i would suggest 2 more alternative,

1. Transfer Code & Data Recovery page

2. Email BNEI's (Bandai Namco Entertainment Inc) customer service, ww_dragonballz_db_ad@net.bandai.co.jp

3. Go to BNEI Dokkan Battle official site, scroll down, and select/click "Need to recover your data?"