Forum TI-Planet.org

Need to downgrade my TI-Nspire CX II from 6.0.3.374 to 5.3.0.564

Ndless doesn't support this OS version and I can't find anything that will help me downgrade my calculator's OS

Some things I've tried is a hack that is supposed to disable downgrade protection (that didn't work) and maintenance mode, where I can delete the OS. I couldn't reach maintenance mode, if anyone knows how to do that correctly please tell me

Hello.

Sorry. Without Ndless downgrading a TI-Nspire CX II is, as far as I know, impossible.

you press the reset button on the back for 3-5 seconds and then hold down the ee, doc, and the on button at the same time before it powers back on or in the process of it turning it back on

In no way this is going to help you downgrading.