LTE TDD is for China B38 = 2600/39 = 1900/40 = 2300/41 = 2500
LTE FDD is for europe B1 = 2100 MHz / B3 = 1800 / B7 = 2600/900 = B8 / B20 = 800
For France it is: B3 / B7 / B20
If it is a Chinese he works in France only with B38 4G frequency of 2600 MHz., Does not capture other frequencies.