I have had this problem since day one back in March. If I have my phone in LTE mode I will sometimes lose data completely and it doesn't seem to recover. I live in an area that is near 4g so I travel between 3g and 4g coverage. If I leave the phone in "CDMA auto PRL" then all is fine. I have seen posts where you change the CDMA Rev A to enable via the ##778 method and that does not work for me. I also have the latest radio images baseband I have used 3 different ROMs and they all behave the same. Is there anything else to tweak?