I've got an LG Optimus running under Verizon.
This solution is NOT working for me. I was told that each comma was supposed to delay dialing for 2 seconds. I started testing with 2, and I'm now up to 10. No matter how many commas I enter, the poc dials the password almost immediately. Adding the # did nothing to change this.
(Side note, since I found a workaround: modifying the actual VM number was impossible. I would make changes, and click save. It would revert back to *86 every time. I have now entered the VM number I want to use, including commas and password, and put it under speed dial #2.)