[iPhone 4] How do I update to iOS 6.1 still preserving my baseband?
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Ruamrudee • February 4, 2013 at 9:19pm
I would like to update my iPhone 4 to iOS 6.1 but I need to preserve my current baseband version to keep my carrier unlock working.
Answers
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iClarified • January 12, 2026 at 7:04am
To update your iPhone 4 to iOS 6.1 while preserving your baseband, you need to use a tool like RedSn0w or Sn0wbreeze to create a custom firmware (IPSW) file. First, download the iOS 6.1 firmware for your specific iPhone 4 model. Launch RedSn0w, navigate to Extras, select Custom IPSW, and point it to the firmware you downloaded. RedSn0w will then generate a new IPSW file that excludes the baseband update components. Once the file is created, use RedSn0w to enter Pwned DFU mode. Open iTunes, hold the Shift key on Windows or the Option key on Mac, and click Restore. Select the custom IPSW file you just created to begin the update. This process allows you to upgrade the operating system without updating the baseband, which is essential for maintaining software unlocks or using certain SIM interposers.