i have flashed my very old U.S. version Garmin205 with the firmware for chinese version Garmin255. now my GPS is able to input and speak chinese. and also enabled the function of speak street name.

i just wondering if i can flash it to more higher version like 550 to enable more functions ? if they are using the same HW platform.

any one have any idea ? the list of same HW platform models.

thanks