Report AVIC-MRZ99 Custom Firmware / Testmode in Hacks/Mods Posted October 28, 2020 On 2/26/2017 at 10:44 AM, dzo said: OK, it must be a completely different platform, the only thing I can suggest is that you try to make a testmode key using this: https://github.com/bassrock/AVIC-NEX/tree/master/TestKeys This is the newer format for testmode keys. You can also experiment to see if there is a key combination to get you into testmode. I took a look as the user manual for mrz099 and the UI is completely different to the mrz99 so it's very unlikely that anything here will be of use to you. Hey @dzo I am trying to get into my test mode with my AVIC RZ33 (2015, firmware at 2.0 something) but none of the keys that you posted in this thread works . I was searching this thread around and found out these perl files. How am I supposed to compile or use these files? Any help would be appriciated.