My 3g and 4g turns off a lot when the data connection is on and cdma/lte is on. I can turn on airplane mode and turn it back off and get 3g for just a little while. My mom has the droid bionic and she always has 4g right next to me when I don't have any signal. Most of the time I don't get signal. My phone is up to date and I can't figure out how to fix this. Can someone help me please?