This is perfectly normal. 2.4Gwifi in the 20 MHZ band bandwidth, the theoretical maximum bandwidth can reach 75 megabits per second. So 2.4Gwifi can run 50 megabytes is very normal.
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5G network in the band bandwidth of 160 MHZ, the theoretical maximum bandwidth can reach 867 megabits per second, so 5G measured network speed is 500 megabits is normal