[Q] [Really need HELP PLZ]Trouble on downgrading SPL After Offical 7.5 and OSPL 5.0

---

- Sorry for my poor English

- I'm a HD7

- I really can't find a method to downgrade
can somebody really can help me :'(

- I am a OFFICAL mango now
and having a OSPL 5.0

- I want to flash DeepShining v2
I know what I need to do are downgrade SPL in order to upgrade HSPL and
flash the ROM

- I follow this guide that I have downloaded a offical Pre-NoDo Radio in order to
downgrade my OSPL

- It fail :'(.Luckily I have not find anything bad after the failure
When the device is flashing the Radio ( 3%, according to the processing bar)
It turn off and reboot normally

- I have tried that flashing offical Pre-NoDo ROM, offical Mango ( without
internet sharing ,which will change the SPL to 4.5 after success) ROM, and
offical Mango Radio ( the version without internet sharing too) ,instead of the
offical Pre-NoDo Radio

- They all FAIL :'(

- Is there no method to downgrading SPL After Offical 7.5 and OSPL 5.0
And What I can do now...