There are so many cards out of the compatibility list. If I were you, I will buy a 3G card in the list. I think it takes time to release a firmware.

Not receiving the signal...No wireless network found?? You'd better attach a screenshot of searching for wireless networks. Find the wireless icon at the right bottom corner of the screen, and click...

Is it showing unable to join TP-LINK_******？ As I know, disable WMM is a good try. 1. Log into configuration page. http://www.tp-link.com/en/article/?faqid=174 2. Go to Wireless/Wireless Advanced....

Try to fix or change a wireless channel on root router and survey its connection on wa830re again. Reduce distance between router and range extender.

Hi Bart, It is for printer sever function. However, yours is not in compatibility list. I think that's the key point.

How about WMM disabled? Vanwegen, you'd better provide model no. TP-LINK may be connecting such cases.