According to the Cellular Telecommunications Industry Association (CTIA), specific absorption rate, or SAR, is "a way of measuring the quantity of radiofrequency (RF) energy that is absorbed by the body." For a phone to pass FCC certification, that phone’s maximum SAR level must be less than 1.6W/kg (watts per kilogram). from cnet.com
Top 10 Worst cellphone radiation offenders:
| Manufacturer and model | SAR level (digital) |
| 1. Motorola V195s | 1.6 |
| 2. Motorola Slvr L6 | 1.58 |
| 3a. Motorola Slvr L2 | 1.54 |
| 3b. Motorola W385 | 1.54 |
| 4. Motorola Deluxe ic902 | 1.53 |
| 5a. Samsung Sync SGH-C417 | 1.51 |
| 5b. Motorola V365 | 1.51 |
| 5c. RIM BlackBerry Curve (AT&T) | 1.51 |
| 6. Palm Treo 700p (Verizon) | 1.48 |
| 7. Sony Ericsson W880i | 1.47 |
Top 10 lowest cellphone radiation:
| Manufacturer and model | SAR level (digital) |
| 1. LG KG800 | 0.135 |
| 2. Motorola Razr V3x | 0.14 |
| 3. Nokia 9300 | 0.21 |
| 4. Nokia N90 | 0.22 |
| 5. Samsung Sync SGH-A707 | 0.236 |
| 6. Nokia 7390 | 0.26 |
| 7a. Samsung SGH-T809 | 0.32 |
| 7b. Motorola Razr2 V9 | 0.32 |
| 8. Bang & Olufsen Serene (Samsung SGH-E910) | 0.33 |
| 9. T-Mobile Sidekick 3 | 0.5 |