Upgrade to iOS 5 on iPhone 4 and Preserve Baseband – Mac Users
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Follow the steps explained below to Upgrade iPhone 4 to iOS 5 firmware . Latest version of Redsn0w 0.9.9b5 is used here to Preserve Baseband and create custom ipsw used for upgrading to iOS 5 without changing original baseband . This tutorial will be useful for those who rely on Ultrasn0w or Gevey Sim based unlock .
Note : This tutorial will not jailbreak your iPhone 4 . Redsnow 0.9.9b5 was not available for Windows at the time of writing this tutorial . Windows users can use Snowbreeze iOS 5 Upgrade Tutorial to preserve baseband.
Steps to Upgrade iPhone 4 to iOS 5 :
- Download iOS 5 ipsw
- Download iTunes 10.5
- Download Redsnow for iOS 5 Jailbreak
- Launch Redsnow and connect your device with the USB cable
- Click on Extras button and select Custom IPSW button
- Now browse to the iOS 5 ipsw downloaded in Step 1
- Allow Redsn0w to process the custom firmware .
- After the firmware is create you to select Pwned DFU button to proceed and restore to custom firmware created before .
- Redsnow will now ask you to put your device into DFU mode . For that you have to press and hold both home and power buttons for 10 seconds and release power button and keep holding home button for another 10 seconds . This will put your device in DFU mode . Redsnow will now do its work and put your phone on Pwned DFU mode .
- Launch iTunes and it will now see your device is in recovery mode . Press OPTION button on Mac / SHIFT button on Windows keyboard and select Restore and browse to the new IPSW file created above .
- iTunes will now restore your device to new custom iOS 5 firmware .
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do i need the original sim to activate te iphone after this process?
yes…
what do you mean original sim?? isn’t there any other way to activate the phone??
use snowbreeze to hactivate it ?? no need of original sim but it is tethred jailbreak in iOS5
Can i use the gevey sim after update for the IOS 5 by this process?
Sure!
only if you PRESSERVE THE BASEBAND!!!
i try it now ;P
did it works?
hey i followed everything right and it says it cant get into DFU mode. itunes keeps opening and saying that i need to restore. so i select the custom firmware and it says “my device is ineligible” for the 5.0.
i have a iphone 4 (ATT one) and its jailbroken all ready with 4.3.5 jailbroken firmware on it
can you help me out plz would be much appreciated.
10 seconds power + home, after 10sec only home for 10sec. thats all
So ignore the usual way right do the ten and ten. I will give it a shot. Thanks
it says “my device isnt eligible for the requested build.” in itunes. finally got it into DFU mode though.
any suggestions ???
you have to use tiny umbrella
hey I have the same problem. I follow the guide, but when i put it in to DFU mode and restore with the new custom IPSW in my iTunes. A window pops saing: your device is not ineligible for 5.0
Hey if u figure it out please post solution. Thanks
yeah, for sure… you too please!
if you have used tiny umbrella to save your SHSH, then you must
-open TU
-go to the advanced tab
- UNCHECK ” set hosts to cydia on exit
- quit TU
helped for me..
Same thing happened….maybe we need an original carrier’s SIM for it to work..?
NO its due to apple servers…keep trying
Hallo, it is possible to return to firmware 04.10.01 after an update to 04.11.08 ???
Tank You!
No, u can’t go back once u have upgraded ur baseband
try restoring to 4.3.5 stock firmware. The signing window for 4.10.01 was open till yesterday so Chances r u might get ur old BB back. Try & give feedback.
Yes can downgrade! I did! I upgraded to ISO 5 before I read all the details of the new OS. I didn’t Know the new IOS 5 changed the BB as well
I thought I turned my iPhone into a $500 paperweight 
However I did manage to downgrade again, (Please note: I saved my SHSH File before I upgraded) and got my Gevey sim working again. I then followed this procedure to preserve my BB and install the cooked IPSW file. I’m now running ISO 5 with Modem Firmware 04.10.01. My phone is locked to Rogers Canada, But with the help of the Gevey Sim, I’m using a DTAC sim in Thailand as of now. Things to note: 1. I think it’s important to Mod your HOST file, before you can downgrade or even install the cooked IPSW file which is not mention in this procedure. 2. for anyone using a Gevey to unlock their phone, I got mime working fine, in a very short time, But I never did get the 1Bar thing. It just went like “NO SERVICE” to 5 bars of service! I had to play with the Airplane Mode quite a bit though.
Spent close to 12 hours trying to get my Verizon iPhone 4 jailbroke. I’ve been doing this a while and this was the most difficult time ive ever had. Really though once I figured it out. It shouldn’t have taken more than ten minutes. Seams like a lot of the problems are caused by iTunes. UNHOOK ALL EXTRA USB DEVICES!!! I probably received 20 different error codes and tried every jailbreak tool I could think of. Nothing worked. I unhooked my printer and external hard drive restarted my computer and it worked first try….. It always ends up being something simple!!
I have a verizon phone too and I was wondering if I had to update my phone to ios 5.0.1 before I jailbreak? I read a shit ton of articles showing me how to preserve my bb and ran into the error that itunes says “you firmware is not compatible” at the custom restore step…So should I just update and then just jaibreak? Also what is your baseband now? I really don’t want to make a mistake and end up not being able to jailbreak or downgrade back to my 4.2.8 firmware.
I did this, and my gevey sim works on iOS 5, but i don’t have anymore Personal Hotspot ! even in cellular data network there is no personal hotspot configuration, there are just the cellular data and MMS ! howcan i solve this problem ?
This problem was observed by me also.
There is no solution as of now.
The problem is , earlier there was “Unknown” carrier bundle in carrier bundles list on iphone. It was for the folks who uses there phone on roaming while travelling to other countries.
with iOS 5 update Apple just removed that bundle & now it is causing problem.
Just go into setting – & click on reset network setting once.
It did not work for me but might work for u.
hey GP …i have got some help from you in past and that have worked. so this time i would again like to ask you that.. i am on 4.3.5 iphone 4. at&t.(currently unlocked using gevey sim) when i tried to restore and update from 4.1 to 4.3.5 it used to show that the iphone is not elegible for the requested build up. and then i upgraded directly from itunes apple via that update pop up it worked perfectly. Now i have to upgrade to ios 5 preservilg my base brand so that i can unlock via gevey sim so after hearing some peoples comment that they are facing the same problem so i am worried that while upgrading my iphone to ios5 preserving my basebrand i may too face the same problem which will leave my iphone to recovery mode. need ur help on this GP. reply soon.
hey GP…upgraded to ios 5 but personal hotspot not working there is no option.. tried resetting network settings then to its not working.. need help on this as i use my ipad on iphone’s network.
@Ronak – Hey Ronak. Ya I do remeber u.
.
I am finding solution on this problem and will let u know once something is found.
I am also missing personal hotspot too much
@GP…Thanks mate…I am really enjoying ios5 features..its surely worlds most advanced OS..and lucky me that every thing worked out with me perfectly…sure please llet me know when you find some solution for personal hotspot..thanks again..
Regards.
download pda net or mywii from Cydia
download pda net or mywii from Cydia they are much better then simple wifi hotspot
worked perfectly!!! thanks a lot!!
Hi, sorry to jump in here,
it seems like everyone is succeeding at upgrading to ios 5.0 and preserving their baseband at 04.10.01 or earlier. I’ve been trying and keep running into ‘unknown error 11′ in itunes. anyone have this issue or know of a fix?
ps. i read that this error has something to with an extracted baseband file within the ‘custom’ ispw that im trying to restore to.
I used sn0wbreeze 2.8 bet 8 ..And it was easiest upgrade ever …
I’m using the same , but the problem still persists.
The custom ipsw in simple mode is made , but after entering the dfu mode, during the restore process , This ERROR 11 pops up.
Not able to get throug at all.
Any suggestions? Been sitting on this all morning .
Thank u
All u need to do is enter DFU Mode. Error 11 means you’re not there.
iTunes says” This iPhone could not be restored. This device is not eligible for selected build” Any one can help?
I am worried about the same problem as i have faced the same problem while upgrading from 4.1 to 4.3.5..!
I had all these problems yesterday. I was getting so many different error codes that I wasn’t sure what to do so I was trying everything. Finally I took all extra USB devices off of my computer. Restarted it and did a shift restore with ios 5 and my iPhone 4 Restored immediately. Idk why…..like I said I was getting so many different errors I wasn’t sure what to do. The redsnow jailbreak was simple. Only took a few minutes. I spent over 8 just trying to get iOS 5 on to my phone so I could begin the jailbreak… Idk if that will work for you but it did for me. Good luck
Same mistake after taking all usb devices off. Will try again. Any suggestions?
The servers from apple have problems
please can somebody explain the thing with the “original sim needed for activation” that was mentioned at the first comment here?? what can i do if i don’t have the original sim??
Buy a prepaid sim Or hacktivate if posible
from what i know till now there is no hactivation procedure…or is there??
I think a lot of it probably is apples servers. I noticed it was taking forever when I was downloading and running the programs. Idk. It’s frustrating though……
Here in europe they write that the apple servers have problems.
Guys working perfectly…
finally upgraded iphone 4 to ios 5 preserving base brand and unlocked using gevey sim.. works just perfect..
would like to say something about the problem or request build up during upgrade
Before upgrade insert your official sim card and reset all settings on your phone and after that make sure you have put your iphone into DFU mode correctly.. it should work out..A risk worth taking for ios5.
everything goes fine up until the preparing iphone for restore part in itunes. error message 1604 states: iphone could not be restored, any ideas?
Put ur iphone in DFU mode. If u r using sn0wbreeze , run iREB before restore. Available on ih8sn0w dot com
I just rejailbroke mine again twice with redsnow. Worked just fine. Nothing like yesterday. I’m having problems with springboard…..any ideas?
Is there facetime work on your phone after jailbreak and unlock ??? Or Gevey sim??? My can’t work on gevey!!! Only at&t sim work!!! Any idea for this please post ASAP! Tx
Pl help.. I did create custom ipsw for ios 5.0 via sn0wbreeze.
It did preservd my baseband. Bt is it necessary to Jailbreak as well in order to use Gevey Pro Sim??
I dnt want to jailbreak my phone. Plz help… Mine is iPhone 4 wid BB 4.10.01 n is AT&T locked.
no , jailbreak is not required for gevey unlock
can u plz tell d procedure…
1.create custom ipsw using redsnow
2.will den use dis custom ipsw to restore my iphone by keepin iphone in DFU mode n pressing shft key in itunes.
3.after doi dis, i m getting ios 5 on my cell but it is locked completely… means no menu nothing.. only emergency calls.
plzz help…Mr. iPhone Blogger
u can use gevey sim
no need jailbbreak
Someone found the solution of personal hotspot ?? because it is inexistent when I upgrade to iOS preserving my baseband !
download pdanet or mywii from cydia….
h boss
my iphone4 is updated 4.3.5 to 5.0 how to get cydia app and
how to sync my old ios contacts on 5.0 and not geting network on gv sim
Hi ,
please help .. i m on gevey sim using 4.3.3 to ios5 .. i understand we need to preserve base band …but my question is I m from India and i bought iphone 4 from US.. AT & T locked….I dont have original AT&T sim now ….please help .is there any means other than original sim….
U will get att sim from ghaffar market in new delhi if u r from delhi
After update iOS 5.0 gevey
sim not work
Lol i make it 5 hours 2 times and its work if you preserve the baseband!
But bb is upgrade 4.10.01 to 4.11.01
How to down bb
Yesterday somebody write it here how you can do it.
Ok, so I went thru this whole process, and upgraded the software, and it preserved my baseband, everything was restored on my phone except my pictures. Help!
i preserved my baseband which is 4.10.01 and updated to 5.0. but my gevey sim still doesnt work
any suggestions?
If it worked before the upgrade, it should still work again after you upgrade to ISO 5 with (the Preserve BB) I had a hard time getting my Gevey Sim working after the upgrade as well. I never did get the one bar thing, (after I got Gevey Screen) like before just “no service” and after that I just kept turning my “plane mode” off and then on, (right away) and finally I got service! Good LucK!
Dear u loose ur gevey because u must remove ur gevey before upgrade ur ios
Change ur gevey
Hi i am new user of iphone i had bought 30 days back and was using gevey sim. When uodate ios 5 available i updated immediately i was not aware about BB or anything now my phone stopped to detecting local network Gevey Sim working but unable to fix network. Now my hands are empty can anybody help me. I am ready to expense also and i am not understanding all these tricks pl help me
Hi
U do downgrade 5.0 to 4.3.5
Open iTunes
Conner your iPhone
Windows user
Shift +restore
Browse 4.3.5 ipsw file
Then restore your bb is down
Mac user
Option+restore
Your iPhone is working in gv sim
yes i downgrade itunes and downgrade iso 5.0 to 4.3.3
but baseband not going downgrade still 04.11.08
As I had tried to shift+restore but i dint found ipsw file anywhere in my pc – can i download this file
Yes you have to download a ipsw file and please read a manual for update with prereserve baseband.
from where i download this file as tried but i did not found ipsw file 4.3.3 ot 4.3.5
http://www.iphone4jailbreak.org/4-3-3-jailbreak-iphone-4.html
u can find from there
Chip.com
I want to upgrade my iPhone 4 from iOS 4.1 (8B117) to iOS 5 but want to keep the option of jailbreaking in the future. Should I use Snowbreeze to update so that the baseband is preserved? Current baseband is 02.10.04.
Baseband preservation is not required for jailbreaking . it is for unlock users only
hi there, I made step by step and it was working
then when it finished installing ios5 on the iphone, it rebooted and started with a setup o activation something (language, region, enable current location, turn on wifi) saying that my SIM was not right (I use gevey sim) that I needed a compatible one.
Now it doesn`t event turn on…
Hi Rigs, did you save your old Baseband? Because if you upgraded to the Stock ISO 5 direct from Apple it will change your Baseband to a version that can not be un-locked by the Gevey Sim. You need to preserve the your old Baseband before you up-grade.
I hope this helps. Good luck.
same prob here i upgrade iso 5 but now i can,t use
Gevey sim coz my baseband 04.11.08
can i downgrade baseband?
i already downgrade my version 4.3.3
i did preserverd my baseband, i did the whole proccedure creating a custom iOS5 to preserve my baseband
the problem is that it tells me at the beggining the my sim is not supported os sth like that
do i need the original one??
Dear u loose ur gevey because u must remove ur gevey before upgrade ur ios
Change ur gevey
by changing my gevey it will work??
i get a error 11 because of ipsw file in a folder? i only have a ipsw file help?
ke wave such urgent need of help please my problem long story read this please someone ke ke good can help me … buy me but iphone 4 when using it only served to call and no one took the internet signal pay me saying it was the security parameter signal but if operator is my country told me clear cell no insurance ke my country was then normal but i used it few days ago i kise ios 5 and install i did me but when complete sale on the screen then choose location country after then select activate wi-fi network to all good ahhh in ai the service and without left eskin did not recognize the sale no clear signal service and good turn after location and gave elegi network and sale next iphone activation last up to 3 minutes and after sale: it seems that the sim card inserted in the iphone not compatible and should be put an operator of a compatible.
that is all please someone help me me ke very expensive cost someone please live in lima peru ke ke can help me please write me
help! i tried this and when i get to step 10 (option + click restore), i get a ‘firmware file not compatible’ error message.
now i can’t even power up my iphone. any ideas??
I just got an iPhone 4 and want to jailbreak and unlock for use on tMobile.
Currently it is running 4.3.5 and 04.10.01. If I upgrade to iOS 5 and preserve the baseband, I will be able to accomplish this?
I buy a galaxy nexus i have a problem with my internet conectivity on my iphone4 -.-
Hi,
I have an Iphone which is unlocked using gevey sim. Currently the firmware version is 4.1. with baseband 2.10.0 and i need to upgrade to 4.3.3 or 4.3.5. If i use snowbreeze 2.7.3 and create custom firmware and restore through itunes will the phone still be unlocked or do i need to activate using the original service provider.
hey guys… i have an Iphone 4 with baseband 4.2.1 and accedently i upgraded it to iso 5 ( I am using Gevey sim)
now my phone is not working at ll itunes says that my sim is not Valid >>> what can i do ?? do i need the AT&T original sim cause i don’t have it … tried to downgrade but it wont let me i always get error and finally got into recovering loops any suggestions my ciphone now is just a piece of metal 
….
)
I’m having the same problem. Can anyone help?
You can’t do anything /: I’m sorry if you don’t preserve the base band your Gevey Sim is useless
Hi guys i know you all are busy but i’d appreciate if could please help me out my problem is as follows: i have an iphone 4 running 4.3.5 baseband 4.10.1..trying to update to ios5 but when i load the NO_BB 5.0 ipsw into itunes it goes through extracting the firmware but then errors out with saying its not the right build for iphone
i have the same problem with updating to iOS 5. i used redsnow to make a custom firmware to preserve my baseband which is 3.10. then i used redsnow to enter pwned dfu mode. i opened itunes and used the custom firmware to update but itunes keep saying iphone not eligible for requested build. also tried tinyumbrella and editing my hosts file deleting the gs.apple.com. nothing seems to work. pls help.
Hello Everyone,
As usual i also upgrade my iphone 4 to IOS 5 and it also upgraded my base band can anyone tell me its solution or when it will be resolve any idea?
I get an error saying, BE WARNED! If you restore stock apple firmware, your baseband can and likely will be updated. how do i ensure this wont happen, and is it safe to jail break while in a contract with a service provider. I’m with optus. I jsut want to make sure it will still function correctly on the network, and not be unlocked or anything.
Thanks James.
Hey guys, I have a kinda unique problem.,I’m using an older Gevey sim, and anytime I am forced to turn off the phone, or simply reboot it, it sometimes takes as many as 50-70 tries to get the phone to recognize the Gevey before I can re-unlock it again. Am I in need of a New Gevey sim card? Is there something wrong with my Iphone? It’s terribly frustrating!! Help!!
Hey Jackdurden, I own two Gevey sims (The Ultra and the Supreme) and I find them both are hard to unlock my iPhone at times. Sometimes I can unlock it in a few tries and other times it can take me up to a couple of hours trying. Right now I’m primarily use the Supreme Sim as I find that one to be the better of the two. With the Supreme Sim installed, I can at least turn my iPhone, (or “airplane mode”) off and on again and the iPhone will find the network on it’s own, (most times) without having go through the unlocking steps again. With the Gevey Ultra sim, I’ve found if I turn either my iPhone or AP mode off and on, I would have to go through the unlock procedure every time! (What a pain ;( Anyways I think you may have to play with your Network settings. What I found that works for me, (whenI have trouble unlocking) is I make sure my 3G is off and my “Cellular Data Network” is on. I found the “Data Roaming” didn’t matter, (on or off). Another thing found is that I often have to play with the “Airport Mode” Selecting it on and off many times and getting the “Invalid Sim” (many times) before I get any bars showing up. I don’t think the Gevey Sim unlock procedure is an exact science. You have to play with the settings and see what works for you. I hope this helps. Good Luck!
Hey thanks for responding to my query, I didn’t think I was the only one out there having issues with it! I know now to just not shut it off unless absolutely necessary and it’s fine as long as I don’t. Good luck with yours too!