iOS 13.4 - 17E255 stopped being signed for 55 devices by Apple

iOS 13.4 was released a couple of days back and the update was rolled out for many devices. If you are to download iOS 13.4  IPSW firmware, then note that iOS 13.4 - 17E255 stopped being signed for some 55 iDevices.

For those who have no idea about the changes made in this iOS version, they can check the release notes for iOS 13.4 here.

Although the iOS 13.4 IPSW isn't signed for the devices listed below, you can still restore them using third-party iOS repair tools like 3utools.


Note that unsigned IPSW files can't be restored with iTunes.

Devices on which the iOS 13.4 - 17E255 stopped being signed for.

iPads

1. iPad Mini 5 (WiFi)
2. iPad Mini 5 (Cellular)
3. iPad Air 3 (WiFi)
4. iPad Air 3 (Cellular)
5. iPad Mini 4 (WiFi)
6. iPad Mini 4 (Cellular)
7. iPad Air 2 (WiFi)
8. iPad Air 2 (Cellular)
9. iPad 5 (WiFi)
10. iPad 5 (Cellular)
11. iPad Pro 9.7-inch (WiFi)
12. iPad Pro 9.7-inch (Cellular)
13. iPad Pro 12.9-inch (WiFi)
14. iPad Pro 12.9-inch (Cellular)
15. iPad Pro 2 (12.9-inch, WiFi)
16. iPad 7 (WiFi)
17. iPad 7 (Cellular)
18. iPad Pro 2 (12.9-inch, Cellular)
19. iPad Pro (10.5-inch, WiFi)
20. iPad Pro (10.5-inch, Cellular)
21. iPad 6 (WiFi), iPad 6 (Cellular)
22. iPad Pro 3 (11-inch, WiFi)
23. iPad Pro 4 (11-inch, Cellular)
24. iPad Pro 4 (12.9-inch, WiFi)
25. iPad Pro 4 (12.9-inch, Cellular)
26. iPad Pro 3 (11-inch, WiFi, 1TB Model)
27. iPad Pro 3 (11-inch, Cellular)
28. iPad Pro 3 (11-inch, Cellular, 1TB Model)
29. iPad Pro 3 (12.9-inch, WiFi)
30. iPad Pro 3 (12.9-inch, WiFi, 1TB Model)
31. iPad Pro 3 (12.9-inch, Cellular)
32. iPad Pro 3 (12.9-inch, Cellular, 1TB Model)
33. iPad Pro 4 (11-inch, WiFi)

iPhones & others

1. iPhone 8 (Global)
2. iPhone 8 Plus (Global)
3. iPhone X (Global)
4. iPhone 8 (GSM)
5. iPhone 8 Plus (GSM)
6. iPhone X (GSM)
7. iPhone XS
8. iPhone XS Max (China)
9. iPhone XS Max
10. iPhone XR
11. iPhone 11
12. iPhone 11 Pro
13. iPhone 11 Pro Max
14. iPhone 6s
15. iPhone 6s+
16. iPhone SE
17. iPhone 7 (Global)
18. iPhone 7 Plus (Global)
19. iPhone 7 (GSM)
20. iPhone 7 Plus (GSM) 
21. iPod touch 7