Hi all, I've an stock N900 (2.6.28-omap1) and a PS3 on firm 3.50 (CECH-2004A DYN-001 Slim 120gb) and would like to downgrade it to 3.41 with modded PUP, just to be able to play backups.

So, after play backups for a few months, can I upgrade back to 3.50 (3.55) and then connect to PSN for online playing games?

*3.55 is currently the newer firmware and there is no method to spoof it using 3.50 (DNS and Logan5). If there is please tell us.