** UPDATE April 8, 2013: problem solved; see last post ***** In a family/home office environment, we have about 8 PC's on Ubuntu, Windows and so on. In addition we have Galaxy Nexus, Android 4.2.1, Samsung Galaxy Note 1, Android 4.0.1, Samsung Galaxy Note 2, Android 4.1.2, SGS Android 2.x. Living in the country side we see no other Wifi signals. The problem None of the Android phones can maintain a stable connection, neither on 2.4G nor on 5G. Right after connecting we are on 150Mbps and then rapidly it drops to 13Mps and stops completely. Very consistent and always reproducable. Especially the Jelly Bean devices are hopeless. Note: I only have tested with Samsung Galaxy's of various generations. The latest firmware 188.8.131.52.342 does not help. Trying about every setting in vain, as an IT expert, I do not give up quickly : - Different channels - Whether or not DHCP / fixed IP on the phones - 2.4 and / or 5G - Wide or narrow channels - Various security protocols - switch off all PC, just one Android, Etc. During testing regularly as the router completely to the factory settings ... but no result. The reason The main pulpit seems to be the security and Wifi sleeping. With "sleeping" I not only mean "deep sleep" but also during browsing the phones try to save battery and that is something Asus does not like at all. The "Solution" If I select "Open Network" all problems seem gone and the 150Mbps connection shines on the phone using 5G. It is a little early to declare victory as I still saw a few hickups. But for now it seems to be a lot better. For a little security, you could: 1- Enable Mac filtering (Wireless -> Wireless MAC Filter -> Freq = 5GHz; Mac Filer Mode "accept"; add your devices to the Mac filter list ). A little Mac spoofing however will break this security layer in 10min. 2- "Set AP Isolated" (Wireless -> Professional -> 5G -> Set AP Isolated to "yes" ): If someone breaks in your network, they at least can not access the other devices, but only use your connection to go out on the Internet. End result I ended my dusty old Linksys WRT-54G as a bridge / switch set. All phones keep stable wifi connection to this switch. So ... if you did buy an ASUS, it is wise to dig up an old Linksys or so. Within 5 minutes you have a permanent connection that neatly gives you 54Mbps. Conclusion: Android and Asus are currently (winter 2013) a bad combination, avoid it. Keep the Asus exclusively as main router, NAS and PC's but avoid the mobiles. PS: I highly recommended App "Wifi Link Speed Monitor" for testing, by the way.