Cellphones and radiation: The 10 highest- and lowest-emitting models

Cellphone users are no doubt concerned about news last week that the World Health Organization classifies cellphones as "possibly carcinogenic to humans." But when it comes to radiation levels, all phones aren't equal. Below are lists of the models available from major carriers that emit the highest and lowest levels of radiofrequency energy.

But keep in mind there's still no conclusive evidence that a phone with a higher level poses a greater health risk — or any health risk at all — than a model that emits less radiation.

Lowest radiation levels:

1. LG Quantum (AT&T;): 0.35 watts per kilogram

2. Casio EXILIM (Verizon Wireless): 0.53 W/kg

3. Pantech Breeze II (AT&T;, AT&T; GoPhone): 0.55 W/kg

4. Sanyo Katana II (Kajeet): 0.55 W/kg

5. Samsung Fascinate (Verizon Wireless): 0.57 W/kg

6. Samsung Mesmerize (CellularONE, U.S. Cellular): 0.57 W/kg

7. Samsung SGH-a197 (AT&T; GoPhone): 0.59 W/kg

8. Samsung Contour (MetroPCS): 0.60 W/kg

9. Samsung Gravity T (T-Mobile): 0.62 W/kg

10. (tie) Motorola i890 (Sprint); Samsung SGH-T249 (T-Mobile): 0.63 W/kg

Highest radiation levels:

1. Motorola Bravo (AT&T;): 1.59 W/kg

2. Motorola Droid 2 (Verizon Wireless): 1.58 W/kg

3. Palm Pixi (Sprint): 1.56 W/kg

4. Motorola Boost (Boost Mobile): 1.55 W/kg

5. Blackberry Bold (AT&T;, T-Mobile): 1.55 W/kg

6. Motorola i335 (Sprint): 1.55 W/kg

7. HTC Magic (T-Mobile): 1.55 W/kg

8. Motorola W385 (Boost Mobile, U.S. Cellular, Verizon Wireless): 1.54 W/kg

9. Motorola Boost i290 (Boost Mobile): 1.54 W/kg

10. Motorola DEFY (T-Mobile); Motorola Quantico (U.S. Cellular, MetroPCS); Motorola Charm (T-Mobile): 1.53 W/kg