Hi, all working great when I upgraded all my wAP ac to version 6.41. When I also upgraded the Firmware to 6.41 I could not get speeds more than 12Mbps on 2.4GHz (My laptop has only 2.4). When I downgraded to 6.39 (Bugfix) it all came to life. even though that Routerboard firmware is 6.41. hope this ...