Are the packet aggregation and channel bonding on or off?

Create another SSID that's AS BASIC as it can be (no password/ encryption) on run in B&G mode (No N) and see if the iphones connect then.

If they do they build up the security from there until they break

If it still doesn't work I would put in a support email to Draytek.

I would hate to think the successor for their flagship ADSL router is faulty out of the box

I finally got it working, but it's definitely a strange one.

Firstly I created another SSID in SSID2 with no security, the iOS devices could connect to that fine.
So I then applied security in the form of WPA/WPA2 mixed mode, and they could still connect.

Then I moved this test SSID from SSID2 to SSID1, and they stopped working.

So as a fix at the moment I have two SSID's, one which the Windows Phone's can use and one the iOS devices can use.

Both SSID's are running B&G&N mode with aggregation and bonding switched on.

Thanks for your help sicon, I think I might point Draytek in the direction of this post to see what they make of it!

I have talked to SEG about this issue and they are going to raise it with Draytek apparently.

Good news, keep us updated.

Update...

Both SSID's became unreliable on both iOS and Windows platforms, so as a temporary fix I have deployed an AP-700 - which works perfectly.

I have not heard anything further from SEG or Draytek regarding this issue.

I am thinking it is not a general 2860n problem otherwise I would have seen more forum posts about it by now, or at least some further replies to this post; maybe they have a duff 2860n.

+1 for exactly the same problem. If you put the device on a static ip it works, it seems like there's a problem passing the dhcp requests through to the wireless.

Sbs2011
DrayTek 2860n
iOS devices