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I am wondering if it is possible to downgrade an iPhone to older versions of iOS even when the firmware is not signed by Apple.

I am a developer and I might need to install iOS6/7 on my iPhone, which currently has iOS8.

Is there a way to do that?

pnuts
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MeV
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  • You can download simulator of iOS 6 ... Its easy way to test your app ... – Jogendra.Com Feb 19 '15 at 12:05
  • I might need to test functionalities not available in the simulators (notifications, accelerometer.. etc. etc.) – MeV Feb 19 '15 at 12:05
  • Have a google, you can download the old IPSW files and install them through iTunes. - https://ipsw.me – Wez Feb 19 '15 at 12:07
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    try this may be help full ... I never try this .. http://www.wikihow.com/Downgrade-iOS – Jogendra.Com Feb 19 '15 at 12:07
  • @Wezly how can i install them if Apple is not signing them anymore? that is my question – MeV Feb 19 '15 at 12:18
  • @Joge i will have a look on your link, but as far as i can read it's not possible to downgrade because of the signing – MeV Feb 19 '15 at 12:19

2 Answers2

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No, if you had an older device and saved the SHSH blobs when Apple were still signing the firmware then you would be able to.

I keep an old device for each major version of the OS from 4 upwards, and you get get them on ebay for quite cheap. iOS 6 is a very small percentage of the overall market now, so unless you are needing to support it for a specific reason it would be best to drop support.

Gary Riches
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    It's unbelievable that I am not able to choose the software that is installed on my iphone, there should be a way! – MeV Feb 19 '15 at 12:20
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If anyone is still interested in this in 2017, you can save your SHSH2 blobs by following this guide & then using Prometheus from Tihmstar.

Brandon
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