bb 8320 v4.2.2.180
nuvi 360 (bt v3.0)
nuvi 680 (bt v3.0)

i just upgraded both my gps and my phone from the garmin nuvi 360 to the nuvi 680 and from the 8700g to the 8320 respectively. the 360 and the 8700g worked together so flawlessly and transparently that it was a jarring moment to find out that although the 680 and the 8320 would pair and connect just fine, they would disconnect within a few seconds.

i've called garmin twice now, but the problem appears to be with the phone. it shows the same disconnecting behavior when i connect it to the 360 instead of the 680. but it does work fine with every other bt device i've paired it with including earpieces (3), stereo headsets, computers and even a portable bt gps unit.

garmin today said there is a note attached to the curve model saying something like 'support coming soon', but i think the fault lies in the phone.

i tried downloading the bt downgraded files (v2.4 and v2.8 i think), but that didn't work. i've also replaced the phone battery and reset it several times.

in the nuvi 680 diagnostics menu there is a whole page of bt diagnostics which i have no idea how to use and garmin wouldn't provide me an engineer to walk me through them (!). with diagnostics like these i think it would be just a matter of an engineer each from garmin and rim on the phone at the same time to work this issue out.

it is extremely frustrating, especially when you consider the bt option on the nuvis adds $100 or more to the price.

/guy