EA6500 v1 firmware update & Mobile devices with 5Ghz

Hi,

I am bought a router EA6500 and have couple of inquiries about it.

1- It looks like it is the v1 that I got and not the v2.

2- When the v1 firmware version will be updated like the v2 to support IE11,...

3- I have Lumia devices and all my devices are not detecting the 5GHz network on it. I tried all the possible configurations but still without success.

any idea?

Thanks,

MS