[toast0]

Probably try forever. The last head unit firmware added a deep sleep so it doesn't drain the battery and polled much less frequently (this was before 3g shut down and made the telematics much less useful anyway). Might have just been parked in an underground garage or driving through tunnels everywhere. I really should pull the fuse though.

[Arrath]

The classic "my phone just munched 35% of its battery on a short subway ride frantically thrashing the radio in a search for signal" scenario.