Used the sdcard technique, it work, using a unlock img, you need the gma and unl files. I just created a blank gma and unl file on my SDCard, now my 890hd map is 2015.3 (JCV & Lane assist working) from 2012.2. Before I learned about the gma & unl file, I would get a message "Cant unlock map" although my map was unlocked.
Does anyone know the built in memory size and the file structure of the nav. in the 890hd, also how to load custom poi, vehicle or voice ?. Any help is appreciated.
Thank to all the contributors to this forum, great info.
Last edited by mrbombastic; 12th January 2015 at 01:51 PM.
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