Cell phone calls often get routed to voice mail, even when the recipient’s cell phone is on and its service signal strength is high. Often, the network didn’t complete the calls due to congestion so it automatically sent the calls to voice mail. But, as Knowledge Center mobile and wireless analyst J. Gerry Purdy explains here, this process can be replaced by a level of network intelligence that allows important cell phone calls to be completed even if it takes some time for the network congestion to be reduced. – Here’s a common situation: You’re holding your cell phone and, all of a sudden, you see a notification that you have a voice mail. You think that’s strange since you had the cell phone right there in your hand and didn’t see any call coming in. You listen to the voice mail and then you call the pers…