After using the most recent beta firmware since last week, I had to go back to 2.4GHz since the 5GHz was way too buggy, and kept disappearing/ going offline.

jimasek wrote And your opinion after testing? No problems with speed and WPA2 enabled yet, although the 5GHz stopped working twice between last night and now, requiring a reboot for the router to...

I found a firmware from December 31 posted on the polish TP-Link forum ftp://tplink-forum.pl/Beta (It's the one that starts with Archer C7) from this thread....

hippopotamus wrote I have the following beta and it seems to work fine for the last week. Firmware Version: 3.13.34 Build 131231 Rel.54959n Do you have a link to this firmware? I'm on build 130812...

I have this exact same issue with my Archer C7. The 5GHz doesn't work with WPA2 encryption enabled, as tested with my Macbook Retina and my Nexus 5. The link speed usually max's around 54Mbit/s, but...