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I am the same problem with the 2570E modem. If I disabled all wifi password, then all my devices are able to discover the SSID and connect to the modem.In my cae I also use WEP setting. The strange thing is on the 1st day after i setup the 2570E modem, all my devices can connect to it via wifi just fine. On 2nd day, only the notebook PC that I used to setup the modem can connect to it via wifi.