The Samsung SM-G998U1 Galaxy S21 Ultra 5G UW Dual SIM TD-LTE US 256GB (Samsung Unbound O3) supports 4 GSM bands, 5 UMTS bands, 25 LTE bands, and 3 CDMA bands. See the tables below for details.

This device accepts the following SIM types to connect to mobile networks:

  • e-SIM
  • Nano-SIM (4FF)

Run a cross-reference compatibility check of this device on a specific network and country using the following links:



Supported Frequency Bands (37)


Related Listings