Any idea if it is necessary to register a device with a Garmin Connect account? Or, more particularly, is it necessary to de-register a device before someone else can use it to upload to their own account?
I've used 3 different devices with my account - Garmin 305, 500 and 110. In each case it has been plug&play and any association between account and device seems entirely transparent. Problem is I've now sold the 305 to a mate and he's having problems uploading his own workouts to his existing GC account. Seems it wants me to de-register the device first but I can't find an obvious way to do this.
Each device seems to have a unique device ID but I can't find anywhere to change the name/ownership status.
Any advice appreciated!