For me the problem seems to be 802.11g vs n, not 2.4 GHz vs 5 GHz. A 2.4 GHz only 802.11n network also doesn't work.
For me the problem seems to be 802.11g vs n, not 2.4 GHz vs 5 GHz. A 2.4 GHz only 802.11n network also doesn't work.