I used to keep my Bionic in "CDMA only" mode in order to save the battery. I finally found that setting under the rearranged ICS "Settings Menu" but it's grayed out. How can I switch the phone to CDMA only again? I only use 4G/LTE when I'm tethered. Also, the new USB menu doesn't seem to have a "Charge Only" setting so at times I can't leave the phone plugged into my laptop and use it too. Is there a way around that?? Thanks in advance.