I just picked up the Charge on Saturday and I'm having issues with the phone dropping from 4G to 3G. I have to go into Settings > Wireless Networks and toggle from LTE to CDMA and then back to LTE for it to go back to 4G. My phone usually has 3 bars and as long as I keep the phone "active" it doesn't switch. However, if I put the phone down and let it go into standby for more than 5 minutes, when I go to use it, it has switched to 3G and I have to do the toggle setting game to go back to 4G.