Is there a cheat device for 3.90m33? If there is can someone post a link to it or a link to the 3.71m33 cheat device.

just go to this page:
http://www.cheatdevice.com/

the download link for the cheatdevice will have the 3.52 and 3.71 versions in it.
there hasn't been a 3.90 update to it, and I'm not sure if the 3.71 one will work.

and if it does, that version has a bunch of mixed results.
some say it works perfectly, and others say it has some bugs.
since neither edison, or any of the cheat devs (as far as I know) have done any testing with it, I would take anything said about the 3.71m33 cheatdevice with a grain of salt.

Yo Bulldog533

If you desire to install cheat device to your psp 3.90 m33, then pm me now.
I will also show you how to install and use sunshine customs which is supposedly incapable of running on m33.