I bought it for a 3G beeline modem. The USB modem was determined immediately, did everything as it should, set up the network, but here's the bad guy - every 2.5 minutes the modem reboots. Accordingly, the Internet falls off. No one knows how to deal with this problem and it is not written anywhere. It seems to me this is an individual case. This problem was solved by replacing the usb-modem. The firmware turned out to be nothing to do with it.
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