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?