Five phones with high radiation.

[Wasillaguy]

Bluetooth earbuds would get the RF away from your skull, but if the phone's in your pocket, your body is still absorbing the signal to the tower, which is in the 900MHz range.
When you turn on Bluetooth, your cell is now also transmitting at ~2.45GHz, although at a much lower power level. Note that if it's a two way Bluetooth device (has a mic) the earbud device is also transmitting at 2.45GHz.
So, Bluetooth is a good idea, as long as you set the phone down several feet away, but that makes staying mobile pretty clunky- every time you want to move to another room, you have to go pick up the phone and find a spot to set it in the next location.

Between health concerns, privacy concerns, ID theft concerns, addiction concerns, and the loss of face to face interpersonal interaction, and the highway robbery plan rates, I'd love to see people shun them. I don't think it will ever happen though.
Personally, if I didn't need it for work, I'd not have one. Some day...