Downgrade 3G to 3.1.3 keeping bb 6.15?

[douglh]

I have baseband 6.15, which cannot be downgraded, but is it possible to downgrade fw version from 4.2.1 to 3.1.3? It is unlocked to run on Fido (Canada) and I want to keep that working!

[Simon]

Yes it is possible to do that. You will get an error 1015 during the restore, just use tiny umbrella to exit recovery after you do.

[douglh]

Thank you. Two things I want: First to install MyWi, and second to change the damn wallpapper!! On the second item, I could change the wallpaper right after I first jailbroke it and before I accidentally upgraded fw 4.2.1. Now I cannot change it; is that due to 4.2.1 on a 3G or the bb 6.15?

[Simon]

4.2.1 on a 3G will cause that I think