iPad Pro Where can I find the original IPSW firmware for iPad Pro 11-inch 2nd generation (2020)

[excelsior.ink]

I have tried this one:
http://updates-http.cdn-apple.com/2...3DC7/iPad_Spring_2020_13.7_17H35_Restore.ipsw
But it said something that it cannot be authorized.

 

[akash.nu]

The original IPSW the iPad came with you mean?! In that case it’s not possible to install that anymore since Apple will not sign it anymore.

 

[excelsior.ink]

What's the lowest one I can still install?

 

[elvisimprsntr]

What's the lowest one I can still install?

15.0.0

iPad pro 4 11 inch (WiFi) Information - IPSW Download

A2228 Firmware Download ,iPad8.9 Firmware Download

ipsw.ir

 

[excelsior.ink]

What a bummer. I wanted to downgrade to 13 ideally or at least 14. Thanks for replying.

 

[NoBoMac]

For documentation's sake, don't think the 15.0 value is correct. Pretty sure that 15.2 as Apple stopped signing anything earlier than 15.2 (read: 15.1.1) a week ago.

 

[excelsior.ink]

I wish Apple would let me install the OS version that the device was shipped with out of factory if I so choose to. After many years of using Apple devices I have the feeling that the best OS to use it's the one which was shipped with. With patches, but not a newer version.