Nope. As @Cinnamon said, Act.dat is the activation file for the Vita, and cannot be restored unless you had a backup of it, or update the system software then reactivate through system settings (not recommended), or through a PS3.If I learned enough from following @Voxel Studios Act.dat is used to access the vita store
Then I have learned nothing! Nothing!Nope. As @Cinnamon said, Act.dat is the activation file for the Vita, and cannot be restored unless you had a backup of it, or update the system software then reactivate through system settings (not recommended), or through a PS3.
Nothing else you can do about it until we get firmware spoofers for PSN access on lower FWs.