I chatted with samsung care and they say that the s21 Plus does not support 5G MMWAVE and only supports cband and the s21 ultra has 5g MMWAVE and CBAND Is that true?
Looks like the Plus and Ultra are the same
S21 S21+ S21 Ultra
|Connectivity||5G, LTE, Wi-Fi 6, BT 5, USB Type-C, NFC||5G, LTE, Wi-Fi 6, BT 5, USB Type-C, NFC, Ultra-Wide Band||5G, LTE, Wi-Fi 6, BT 5, USB Type-C, NFC, Ultra-Wide Band|
Galaxy S21 Ultra 512g(VZW), Galaxy Book (original, VZW), Tab S8 Ultra, Tab S4, Galaxy Watch3(VZW), M8 Smart Monitor