We constantly used IPSW files, but we are not aware if Apple has given its approval. Unfortunately, when we want to update an IPSW to run on a specific version of IOS, we encounter the problem that there is no compatibility.
And this is because the company is responsible for inscruptar a firm that will serve to identify which versions of iOS that will accept the file without any problems are.
How comprobrar if the IPSW file was not signed or Apple
- With your iPhone, iPad, iPod Touch or Apple TV, proceed to verify the product identifier, so that you. Can verify its existence on the list.
- Then, visit the web site unofficial API TSS and proceed to locate the device ID to perform the signature status check IPSW.
- Then you must locate the build number, ie, the code that will help release version of iOS that, in turn, match the state of the voucher. So, if the state says "yes" means you. You can use the IPSW file, but if she says "no", it means that the file has not been signed by Apple and therefore can not use it any device.
- Finally, if the IPSW file has the proof, ie, which has the signature of Apple, you'll find a link to download the firmware, which will be updated as the iOS version is available.