In China ,There are many China mobile communication operators.Different companies use different patterns.This meaning“7模18频” is “TD-LTE(B38 B39 B40 B41) / FDD-LTE(B1 B3 B7) / TD-SCDMA (B34 B39)/ WCDMA(850 900 1900 2100 / CDMA1x(EVDO 800) / GSM(850 900 1800 1900)' 7mode and 18frequency.
nice to meet you
Hello everyone, I am from China, now live in Beijing, I hope to recognize the English as the mother tongue, I can help you learn Chinese!