HTC Thunderbolt owners should be on the lookout for a software update notification over the next few days. There’s nothing major to report aside from the ability to toggle between 4G LTE and 3G and a faster, more accurate GPS signal. Plenty of users found out last week just how handy it is to have a 3G network as a backup for times when the 4G LTE fails. Of course, that would never happen again. Right Verizon?