Hello friends.
I bought the device a few months ago and I had such a problem from the very beginning, and with the update of the device, the problem was not solved and I decided to wait until the next version. Until a few days ago I installed the new firmware and the problem still persists. When I reset the device to the factory and configure it, I can easily use the 5 GHz band, but I feel that the data transfer is slow, but the connection to this band is fast. But when I turn off the modem and then turn it on, either it is not visible at all or if it is viewed, it can not be connected until it wants to connect! While I do not have any of these problems on the 2.4 GHz band. Thank you for your help.