you will only need an akey when updating from a nonGPS radio to a GPS enabled radio, or the other way around. a keys are only single use, dont bother writing it down. upgrade to the newest radio. its 3.42.30 ported from the vogue today. thank GC for it
here. you can flash through an SD card, and the radio upgrade does not require a hard reset, that is, if you already have a GPS enabled ROM. **I'm not sure about 3.27, but 3.35+ should update no problem.
i upgraded to the previous 3.42 radio yesterday, and a noticeable difference in signal strength for sure,