I found this by pure accident but it has greatly helped the issue for me. The phone must be rooted for the app to work. After your Bionic is rooted go to the Play Store and download (Bionic TCP Buffer Tweak) it is a free app. Open the app and select large TCP Buffers and that's it. It has almost cured my data drop issue. I have been using this for about 4 days now and if I get the white 4G arrows I just reboot and its good for hours. Before I did this I would have times when I just could not use data no matter what. I usually reboot the phone twice a day. Going into Airplane Mode doesn't seem to clear it up for me I have to reboot if I get the dreaded white 4G.