hey everyone, i have a similar problem on iphone 3gs 4.1 unlocked and jailbroken with ipad baseband, i belive is the new bootroom and i dont have the shsh saved.
i thought that i was going to be able to upgrade to 4.3 today with no problem but im getting the 1015 error on itunes, right now the phone its on recovery and im not able to take it out, any advice i would really appreciate it
When you chose to use the ipad baseband it came with a number of warnings. One of those was that you will never be able to restore to standard software ever again. You can only restore to custom firmware.
You should go back and read those warnings. If you want to go to 4.3 you should wait until pwnage tool has an official update and cydia works properly on 4.3 neither of which are true at the moment.