We have installed the new firmware update, EF07, and are still having problems with VPN. My wife works for Verizon Business and is unable to keep a connection for longer than 20 minutes. After getting dropped and loging back in she will get dropped about 5 minutes later. This seems to keep happening until the next day when she can stay on for 20 minutes then start the cycle over. We have 4G service. We have used, and still have, a MiFi2200 with which we never had this problem. Any help with this issue would be greatly appreciated.