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Update to 5.0 with Custom FW

Herzog

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Hello
Now I'm using 4.1 (8B117) 05.13.04 (f locked) 3GS JB. I want to update to iOS 5. The question: how to make a custom FW 5.0 or 5.1? I have to unlock and JB too.*
Thank you for your help!
 

willerz2

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You may as well upgrade to 6.1.3 for a larger variety of app support. You won't need blobs for 6.1.3 as you would 5.0/5.1. Assuming you're using UltraSn0w, your device should have no issues unlocking again if you preserve the baseband.
 
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Herzog

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Thank you for answering. But I'm not sure I understand. Have I preserve the my current baseband or I have to upload original 5.1 FW with his original baseband?
 

willerz2

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If you're planning on using UltraSn0w, you have to preserve your baseband. If you don't plan on using UltraSn0w, you don't have to preserve the baseband.
 
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Herzog

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Hi,
I want to upgrade my 3GS FL FW 4.1 BB 5.13.04 - Custom FW, with iOS 5.1
Shall I preserve my current BB 5.13.04 or I have to upgrade and the baseband too (with the original 5.1 BB)?? After restore I have to unlock and JB.
 

willerz2

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Preserve your baseband if you're planning on unlocking using UltraSn0w specifically. All other unlock methods will not require a specific baseband. When using RedSn0w, it will prompt you asking whether or not you want to preserve the baseband. When using iFaith/Sn0wBreeze, make sure you choose to preserve your baseband.
 

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