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To maximize your SAR comparison experience with color-coded SAR charts, please view the comparison in landscape mode. Position the top and bottom of your phone to the left and right to maximize screen size. Adding a third phone to compare is only recommended for tablets and computers with larger screens. Use the dropdown to continue.


Samsung Galaxy S21 Ultra vs Samsung Galaxy S23 Ultra

FCC SAR Levels for Compare Cell Phone Radiation Levels
  • FCC Approval Date This is the date the phone SAR test was completed before the phone's release to the public as required by law.
    22 December 2020 28 November 2022
  • FCC ID The FCC ID is the code used to register a device for FCC compliance
    A3LSMG998U A3LSMS918B
  • FCC Report Link A direct link to the FCC's website for confirming SAR levels that are listed on our website - We did the homework for you!
  • US SAR Ratings USA Legal Limit is 1.6 W/kg

    Samsung Galaxy S21 Ultra

    USA Legal Limit is 1.6 W/kg - FCC SAR testing is measured in watts per kilogram (or W/kg) averaged over ONE gram of simulated biological tissue.

    Samsung Galaxy S23 Ultra

    USA Legal Limit is 1.6 W/kg - FCC SAR testing is measured in watts per kilogram (or W/kg) averaged over ONE gram of simulated biological tissue.
  • Head SAR Level SAR test when held against your head when only using cellular service. Wifi and other transmitter are NOT active
    0.77 W/kg
    0.98 W/kg
  • Body SAR Level SAR test when held against your body only using cellular service. Wifi and other transmitter are NOT active
    1.02 W/kg
    1.10 W/kg
  • Product Specific Use SAR test when held against your body only using the phone as a hotspot. Cellular and other transmitter are NOT active
    1.16 W/kg
    1.20 W/kg
  • Simultaneous Transmission The highest possible SAR recorded with ALL transmitters active, Cellular, WiFi, and Hotspot
    1.59 W/kg
    1.59 W/kg
  • Simultaneous Head The highest possible SAR test when held against your HEAD with cellular and WiFi transmitters active,
    1.17 W/kg
    1.59 W/kg
  • Simultaneous Body The highest possible SAR test when held against your BODY with cellular and WiFi transmitters active,
    1.57 W/kg
    1.59 W/kg
  • Hotspot SAR The highest possible SAR test when held against your BODY using the phone as a hotspot with cellular and WiFi transmitters active,
    1.59 W/kg
    1.54 W/kg
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