Cannot restore 4.2.1 greenpois0n?

[mca2]

For months I'd been running 4.2.1 on my iPhone4 with the JB of greenpois0n. TinyUmbrella saved all my SHSH blobs so I wanted to upgrade tot 4.3.3.

I started by downloading the original 4.3.3 .ispw from Apple, then fired up TU TSS server (all cydia boxes unchecked), kit alt-restore in iTunes, but near the end i hit the 1013 error. This should be the message that baseband upgrade failed. This resulted in my phone being stuck in restore (restore-loop), iRecovery couldnt fix it.

This is no problem, because using redsn0w I quickly had a working 4.3.3 iphone. At least cydia and all my apps are working fine, only i don't have a provider signal anymore I also find, that my baseband is still stuck at 03.10.01, the 4.2.1 version.

What did i do wrong? How do i get my provider back? And note, that i dont need an unlock as i'm not switching providers etc, and as far as i know the phones are sold unlocked here anyway.

Edit: i think i know the problem, see below, i can not restore 4.2.1?

 

[mca2]

Just to add. I restored 4.2.1 with the help of TU, applied JB and everything is running fine (except i cant put back my backup as it was made with 4.3.3)

So i decided to try again. So i restored to 4.3.3, bailed out with error 1013 (should be normal according to TU FAQ). But then when i select my phone in TU it says it's running on 4.2.1????

What TU indicates is correct? And how is it possible that the restore doesnt apply the correct firmware?

 

[mca2]

Ok, got it working again. Took quite some googling around but this is the trick:
- restore your phone to whatever firmware
- end the restore in the 1013 error (that's good if you want, means your bb is untouched)
- find yourself in a restore loop because Apple found another way of annoying us eventhough we have the SHSH-blobs
- run fix recovery (modified tiny umbrella)
- tadaa, youre in a working version of whatever fw you wanted
- run the jb of your choice (i used redsn0w to get a 4.3.3 JB)

Bit annoying apple has overwritten all my backups in the process.