a custom G4 SPL patched by Olipro which let your device think it has SuperCID (aka CID unlocked)
What is difference between Hard and Soft SPL?
Soft SPL is temporary, this solution is semi-permanent, it will be removed by flashing an original G4 SPL using SoftSPL. Read on for a complete tutorial on how to remove HardSPL.
If you use HardSPL, you don't need a separate loader in the future, just use the RUU provided in the ROM package.
Can I use it for other devices than for a G4 wizard and Blackstone?
There is a G4 Users Version, Use at your own risk!
There is a Blackstone Version
You can use it for another device if you want to have a shiny new BRICK.