A friend of mine has a stock RAZR M and is on 4.1.2. He is on the phone with me and in 4G service sends out a group message with just a short group of numbers within this message. The message won't go through unless he disconnects the call with me and then it goes through. Some times he even send them out individually and they may not go through. They have replaced his phone and sim card. Even had him do a reset. It still doesn't work. Any ideas on what the issue is or a fix? He is at work when it happens so its always the same location and vital it works since its a work related message.