I just used a game such that required 10.2, updated and then downgraded.Does your browser work? if it work you can follow this guide. https://github.com/Plailect/Guide/wiki
I just used a game such that required 10.2, updated and then downgraded.
I successfully downgraded my 2DS to 9.2 using SafeSysUpdater. It really helped.I literally just did a friend's 2DS earlier today. Brand new from Best Buy had 6.0 on it. Did browser exploit to downgrade and did A9LH in less than an hour.