The World Health Organization recently listed the cell phone as “carcinogenic,” which means it could potentially be bad for your health due to the levels of radiation emitted during use.

What kinds of cell phones emit the least amount of radiation?
From CNET:

Samsung Blue Earth

Samsung Infuse 4G

Samsung Acclaim

Samsung Replenish

Huawei Ideos X5

What kinds of cell phones emit the highest amount of radiation?
From CNET:

Motorola Bravo

Motorola Droid 2 Global

Sony Ericsson Satio (Idou)

Sony Ericsson Xperia X10 Mini Pro

Kyocera Jax S1300

Can I use a Bluetooth earpiece instead?

You can use a Bluetooth earpiece, but since those kinds of headsets use radio waves to transmit data, you’re better off using a wired hands-free device. Earbuds with an attached microphone should work just fine.