![]() An unsigned ios (ipsw) firmware is a version of ios that apple no longer supports or signs. step 3 select shsh2 file, double check the generator nonce you just entered and click “yes” to start downgrading. step 2 read the popup carefully and click select ipsw → select shsh, and double check the generator nonce you just entered. Step 1 connect your idevice to 3utools and go to flash & jb → advanced, and click download 64 bit idevice. click on the serial number field, copy the ecid and paste it to a notepad document. step 1: get the right shsh blobs connect your iphone to a computer, then open itunes and click on the summary. However, you’ll need to meet certain requirements before you can initiate the installation process of an unsigned ipsw file. with a usb cable, connect your iphone to the computer, then click next. once downloaded, install and launch it on your computer. get first the fonegeek ios system recovery program. How to restore to an unsigned ipsw with fonegeek ios system recovery step 1. apple periodically unsigns ios version because of security issues and encourages users to make use of additions newer updates have to offer. ios users wouldn't be able to use itunes to restore to an unsigned firmware. ![]() An unsigned ipsw means apple has stopped supporting the ios version.
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