Running 2.1 OTA since 5/14 and have had the audio loss, 50% signal issues and horrible battery life. Airplane mode fix helped signal but did nothing for battery life. After trying various setups from factory wipe to running with no apps I finally found something that fixed (or seems to have fixed) all the problems. Been running 3 days with no audio loss, less than 10% time without signal (with no airplane mode trick) and the battery not dying after 8 hours. Have not had any adverse affects, still getting all my calls, emails and messages. Under *#*#4636#*#* my phone was set to GSM auto (PRL) on the Set preferred network type dropdown. Changed to CDMA auto (PRL) and now the phone actually can be used as a phone and gets great battery life. Rebooted phone, not sure if that is necessary but figured it doesn't hurt. Has worked great for me, just changed my wife's eris this morning and it seems to be working on hers also. Anyone else want to try this out to see if this works on their phone to resolve some of the issues?