We have several different official FCC SAR test available for the Samsung Galaxy S21 in two categories. (each ranked separately)
Head SAR : 0.74 W/kg This Head SAR level ranks #25.00 among popular smart phones sold in the USA. Which puts the Samsung Galaxy S21 Head SAR level at 46.25% of the 1.60 W/kg legal limit!
Click each of the following links to see how many RF Safe radiation warnings there are for each SAR.
FCC Cellular Values: (WiFi Off)Head SAR | Body SAR | Hotspot SAR
FCC Simultaneous Values:(WiFi On + Cellular)Head SAR | Body SAR| Hotspot SAR
The Samsung Galaxy S21 has a USA Head SAR of 0.74 W/kg which is 46.25% of the FCC legal limit of 1.60 W/kg!
Phone radiation limits are different depending on where you live. The FCC/IC (USA Standard) and the Council of the European Union (EU Standard) are measured over a different amount of tissue, either 1g or 10 grams, and different maximum power levels of 1.6 W/kg vs. 2.0 W/kg, so they are not directly comparable.