BB Bold :: 9930 - Cannot Send/receive Phone Calls?

I was issued a phone from my job. As of today my phone currently is not sending/receiving phone calls and i cannot check the voicemail. To make it a bit more clear, i have no phone icon nor voicemail icon. if i use the keyboard to input a number and dial it, it does nothing. if i try to call through contacts my phone freezes. I cannot get into the ringtone options either.This is the third time this has happened to me within the last 2 months. The first time it happened they couldnt help fix the issue and i had to send the phone in for a replacement. last time I called up and they walked through getting the phone totally reset.

So now that it has happened again i have decided to get on the forums and explain the issue and hopefully they can figure out if this is a glitch in the phone, known issue or whatever.. My Blackberry is not my main phone, i have a personal phone i use all the time for entertainment and chatting. This weekend i did not charge my blackberry due to lack of not using it. i also didnt charge it when i was on vacation a while back and this had happened to me as well. Here is the only thing i do every time which may or may not be the cause..i forget to charge the phone. the phone drains the battery enough to shut itself off. when i find out its dead, i plug it in to charge it. a small battery icon appears with a electric bolt through it. i leave it be for about 10 seconds and i want the phone to come to see if i have any missed calls so i press and hold the power button a few seconds. the phone boots up and viola. no phone icon to be found. IMO, this should not normally bring up any issue but this is exactly what has happened all three times. As i said earlier, this is my second phone that has had the same problem. I rarely ever use this phone except to do company business so i am not downloading any apps or games. i use the company phone about 17 minutes a month and check my outlook sync'd calander and emails.