How to Create Custom Firmware IPSW with RedSn0w

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The new Redsn0w, like PwageTool and Sn0wbreeze, lets you create custom firmware to preserve iPhone baseband. You can create custom IPSW firmware with RedSn0w with preserved baseband so you may unlock with UltraSn0w or Gevey SIM.

For those unfamiliar, a custom firmware, unlike stock firmware, preserves your iPhone baseband. With a preserved baseband you can unlock your iPhone either using UltraSn0w or Gevey SIM depending on your current baseband version. Before RedSn0w, Sn0wbreeze (Windows only) and PwnageTool (Mac only) were the two options available to create a custom firmware. RedSn0w just makes the process more simple.

When Dev-Team introduced the custom firmware feature in RedSn0w, it was exclusive to Mac but the RedSn0w 0.9.9b9 or later brings the custom firmware creation feature to Windows users as well.

Let’s create Custom iOS IPSW with RedSn0w…

How to Create Custom Firmware IPSW with RedSn0w

These are the steps to create custom firmware IPSW file using redsn0w:

Note: steps are same for both the Mac and Windows.

Downloads

Download iOS Firmware for iPhone, iPad and iPod Touch
Download Redsn0w 0.9.11b4 or later
Download iTunes 10.5 or later

Step 1

Execute the downloaded RedSn0w file.

RedSn0w Extras - create custom firmware

Step 2

Go to Extras and click Custom IPSW;

RedSn0w Custom IPSW - create custom firmware

Step 3

Now browse and select the targeted iOS firmware (IPSW file) for iPhone, iPad or iPod Touch;

Note: If you’re creating a custom firmware for your iPhone 3GS, RedSn0w will warn you about iPad Baseband patch.

Step 4

Now Redsn0w will begin creating custom IPSW firmware which may take some time.

Step 5

Once the RedSn0w is done with building your desired custom firmware, a success window will appear.

RedSn0w done - create custom firmware

You can find a new custom IPSW file in the same folder where your original (stock) IPSW file was located.

Note: RedSn0w adds “NO_BB” to the name of the custom firmware so you may distinguish it from stock/original iOS firmware.

Warning: If you depend on UltraSn0w or Gevey SIM unlock, you want to preserve your iPhone baseband. BE VERY CAREFUL to NOT ACCIDENTLY USE THE STOCK IPSW! select only the one beginning with NO_BB_*. Stock firmware will update your baseband and you will loose your unlock.

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Posted in: iPad, iPad Guides, iPhone, iPhone Guides, Tutorials, Jailbreak iPad, Jailbreak iPhone, RedSn0w on December 20, 2011

Tags: Custom Firmware, guide

Comments:

danny 21 December 2011 at 9:26 am #

when i followed the instruction .i open the redsn0w and go to custom ipsw and when i go to get the firmware it keep saying not compatible//can u help

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- Youness 22 December 2011 at 10:28 pm #
  
  Make sure you have the latest redsn0w,and the corect ios 5.0.1 for iphone sim card…..it works fine with me.
  
  Reply
youness 21 December 2011 at 9:33 am #

I created the 5.0.1 custom ios…..but Im facing problem activating the phone.
I have an active att sim card,im willing to pass the activation step….than I can use my tmobile with Geveysim,but the problem is it won’t pass it…it shows No Service even its active 100 %.
and I dont wanna use hack activation (deactivate),cuz I dont want it to be tethered.
is there any solution guys?
thanks in advance guys.

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- momentum 19 June 2012 at 9:15 am #
  
  hey !! can u help me out :– im using redsn0w_win_0.9.10b8b.
  i hav 4.1 ios i need to upgrade it to at least 4.3 ios for latest application in my iphone 3gs. i created custom ipsw file of ios 5.1.1, and also tried 4.3.3 but when im tryig to restore using itune clicking shift and restore after some time it keeps giving me error 3194. so i tried editing host file also but no luck. can you help me
  
  Reply
hitesh 22 December 2011 at 11:41 am #

i got iphone 4 ios4.3.3 bb 4.10.01 running with gevey sim …..can i go for custom update????

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- Youness 22 December 2011 at 10:24 pm #
  
  Yes,you can,but its better for you to stay with 4.3.3….for now 5.0.1 is tethred thats mean you need to connect with pc each time you turn it off,also 5.0.1 have problem with signal ..it may shows no service or only two bars.
  
  Reply
fong 25 December 2011 at 8:40 pm #

Hi, i have an iphone 4 ios5.0.1 firmware 04.11.08. can i unlock it and can i custom it (custom IPSW)? if can, how to unlock it? can anyone help me.

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Ilan Dr. Kreitmann 27 December 2011 at 9:33 pm #

Hi, I created a custom IPSW with the new redsn0w in order to preserve my old baseband for my 3gs (05.11.07), but what are the next steps I need to do?

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retro114 28 December 2011 at 4:01 pm #

I tried what you said
Step by step
now when i hit restore and select the BB copy very carefully.
Half way through the process the screen gets stuck and itunes message pops out saying there was an error occurred while restoring (10)

Now, what should i do????
HELP!!

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- ajay178 2 January 2012 at 3:12 pm #
  
  iphone should be in dfu mode check if the screen is black if not try again
  
  Reply
Henry 29 December 2011 at 4:02 am #

iTune did not allow me to update custom firmware, can some body help if instruction missed out any importance steps? Do I still need to run tinyumbralla in order to update custom firmware?

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tEchnoPro 8 January 2012 at 11:33 am #

repo666.ultrasn0w.com was installed. but nothing inside. I have 3GS, iOS 5.0.1 with 6.15.00

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- ReverseEffect 15 January 2012 at 2:21 am #
  
  In Cydia, tap on “Changes” and in the top left corner should be a button called “refresh”…touch that button and a black bar at the top should show “updating database, downloading release, downloading packages, etc…” wait for that to disappear and restart Cydia if necessary.
  
  Reply
kyoko 8 January 2012 at 8:45 pm #

Can I use this method to creat a custom IPSW for my 3GS-baseband 06.15.00? What does “If you’re creating a custom firmware for your iPhone 3GS, RedSn0w will warn you about iPad Baseband patch(step 3.)” mean?

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jbarah05 22 January 2012 at 1:42 pm #

Can you fix your baseband even after you update with a stock ipsw please help me I can’t use my phone

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hadi 4 March 2012 at 12:47 am #

thanks man

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shariyar 4 April 2012 at 2:47 pm #

while restorin in itunes i got an error 1602 wat to do plz help

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George 6 July 2012 at 1:35 am #

right now i am downloading 5.1.1 from http://theiphonewiki.com/wiki/index.php?title=Firmware 5.1.1 Hoodoo 9B208 iPhone3,1_5.1.1_9B208_Restore.ipsw for my 4g.
4.3.1 actuall iOS. Baseband 04.10.01.
using with GEVEY SIM.
Have also downloaded redsnow last version.
I’m gonna keep the BB as described.
after downloading ipsw 5.1.1 and installing via redsnow can i use the same gevey sim ? would i also continue having CYDIA?

DURING the preservation of BB message shows MEMORY EXHAUSTED on redsnow while iphone turned of or on during the process.

please help!
thanks

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George 6 July 2012 at 2:18 am #

OK, now i have the ipsw file named NO_BB_iPhone3,1_5.1.1_9B208_Restore

what i shal do now?

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- lalala 9 October 2012 at 11:12 am #
  
  trow your iphone ahahahaha
  
  Reply
aslam 12 October 2012 at 6:27 pm #

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bambang 25 November 2012 at 12:31 am #

welldone dulur..jazakallah..send me ur update..thanx

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nategrettenberger 27 November 2012 at 9:51 am #

Okay i have a at&t iPhone 4s with the newest software on it. and i downloaded the newest redsnow software and i downloaded the firmware and iTunes… so do i just follow the steps and the when it done i can put my ipnone on any carrier??

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Akusmo 16 January 2013 at 9:56 pm #

Hi, I have an iPhone 3GS iOS 4.3.5 BB 05.16.02 (thethered new bootrom) and I want to upgrade to iOS 5.1.1 or newer, whatever it’s fine. I don’t want to upgrade my BB as I might loose my GPS or WIFI.

Can anybody guide me trough the steps of doing this please?

Thanks in advance.

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fone desire 13 February 2013 at 4:50 pm #

good job

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addictedtomobile 16 May 2013 at 1:45 pm #

Great article, I’ll try to create my own custom firmware with a bunch of colleagues. Just for fun !

Reply

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