What is the maximum Transmit Power sent by 5G Iphone?

 I have been wondering so far how much power a 5G phone, like iPhone 12, can transmit to RAN (Radio Access Network), a.k.a. a base station.

According to the table in standard document ETSI TS 138 101-1, section 6.2.1 for "UE maximum output power", the maximum power for class 2 is 26 dBm (0.398 Watt) and for class 3 is 23 dBm (0.199 Watt).  Class 2 UE (User Element) only transmits at certain frequency bands only, namely n41, n77, n78, and n79, while class 3 transmits in all spectrums.

As stated, the period of measurement shall be at least one sub-frame (sfn, 1ms). 

The above maximum value is rarely reached unless the signal reception by UE or BS (Base station) is too weak.

To understand what are those NR bands, see 5G NR frequency bands - Wikipedia