how Downgrade ios5 to 4.3.5 and restore baseband 4.10.1

[varun29]

Hi guys i downloaded ios 5 on my iphone4 it has upgraded the baseband from 4.10.0`1 to 4.11.08 now i am stuck can not use gevey sim to unlock my phone . I have tried to down grade it to 4.3.5 firmware but while restoring firmware an unknown error (1) occours every time i tried to do it with the help of tiny umbrella same thing happens please can any one help and is there any solution that i can go back to baseband 4.10.01. Has apple stoped signing 4.3.5 firmware.[/B]

[denvk]

I have the exact same problem...Tried to downgrade but it won't work. Can't use my phone now. Does anyone have a solution or do we just have to wait...

[Gumer83]

There is no solution with the new BB for now

[teflon252]

Why would u guys install without reading? smh

[bongski55]

as even tinyumbrella WILL NOT SAVE shsh blobs for 4.3.5 then you cannot downgrade to that.

[UghhOo]

Hey I came across this thread when I was having trouble downgrading. I was very discouraged because you guys said it was not possible but you were wrong, I have successfully downgraded my phone from ios 5.0 to 4.3.5. I upgraded because I thought 5 would be good but then i didnt like it. Having my blobs saved on Cydia's server, I decided to downgrade using the 4.3.5 itunes firmware. I downgraded and received an error code 1 in itunes. I then ran the Redsn0w Jailbreak for 4.3.5 firmware which uses 4.3.4 firmware. Then I had to do a tethered boot. After this I thought my phone was working fine but to my dismay I noticed I had no carrier settings. Therefore I could not use my 3G for internet or send MMS messages. So, in order to fix this problem I used Pwnage Tool to create a custom firmware using 4.3.5 and restored again in itunes. My phone booted normally, my MMS was working and Cydia was already installed. I decided to check the internet on my 3G, I tried to open Safari but it automatically closed. Next I tried to open Cydia and it would not open either. I figured this was a minor issue with the jailbreak so I went back to Redsn0w and chose the option Just Boot Tethered. & then everything worked Perfectly. So even though it was a tedious process full of trial & error, I have successfully downgraded my iPhone 4 from 5.0 to 4.3.5.

At&t iPhone 4