I attempted to plug in a Huawei E3372 and found that it functions correctly as a backup channel. I completely neglected to specify the electricity situation; the iron piece is located in the office. It is able to pick up 2.4GHz signals from a nearby structure that is more than 100 meters away through the two double-glazed windows! And despite the great distance between them, both the phone and the network are able to establish a connection, albeit at a speed of only a few megabits. Absolutely unexpected!
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