[GeoSn0w]

Currently, these versions are signed. You can upgrade or downgrade to these versions either via OTA or using programs such as iTunes, libimobiledevice or 3UTools.


iPhone XS MAX all the way down to iPhone 5S:

1. iOS 12.3.1 (16F203)
   
2. iOS 12.3 (16F156)
   

iPhone 5 / 5C:

1. iOS 10.3.3 (14G60)
   

iPhone 4S:

1. iOS 9.3.5 (13G36)
   
2. iOS 6.3.1 (10B329)
   

iPhone 4 :

1. iOS 7.1.2 (11D257)
   

iPhone 3GS:

1. iOS 6.1.6 (10B500)
   
2. iOS 4.1 (8B117)
   

iPhone 3G:

1. iOS 4.2.1 (8C148)
   
2. iOS 4.1 (8B117)
   
3. iOS 4.0.2 (8A400)
   
4. iOS 4.0.1 (8A306)
   
5. iOS 4.0 (8A293)
   

iPhone 2G:

1. Downgrades freely available on all supported versions.
   

[elrodrix]

Just a quick question: Can I get a signed version of 12.1.2?

[ThePitbullOne]

Just a quick question: Can I get a signed version of 12.1.2?

No