NL678-E 4G cat6 modem. Yes, your phone sim card is ok and the size is 15 X 25 mm. Can i attach my own 4G antennas if i buy 4G version?. 3G UMTS band: 850/900/1800/2100MHz. 4G FDD Band: B1/3/5/7/8/20/28.
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