Interesting problem with my phone that BMW can't diagnose. On occasion, after using my phone it will not hang up, even after turning off car and removing key, i.e. the phone signal icon in the idrive keeps flashing. Radio will come back on but phone is not disconnecting. Disconnecting the phone from the I Drive does not fix it; the only thing that works is removing the device battery, disconnecting the phone, and then setting it up again. I believe this is a result of too much memory in the phone, such as sending large files from blackberry, having too many text messages saved, etc. I'm currently using a Verizon Blackberry Tour. Has anyone experienced similar issues?