I tried installing that garmin xt which is compatible with 5800 before on my c6-01, it doesn't work. It even required me to take out the microSD card in order to turn on the phone.

In order to open the files inside my microsdhc, I also bought a microsdhc card reader.

However, I have shifted to samsung omnia i8910 hd now due to the camera factor. the same garmin files I used to install on i8910, very easy to install.

I dare not to install garmin into my c6-01 for the second time previously.

I dONT knw that there are many versions ns.