Why is the speed on a 4G modem much lower than on a smartphone?
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If you connect one SIM card first to a smartphone, then the speed of 4G Internet is about 12 Mb / s, but if you connect the same SIM card to a modem, then the speed is much lower, about 3 Mb / s. Who knows why and how to solve this problem? Tele2 operator with "Internet for devices" tariff. All modem settings are correct.