Dell :: DW1501 For Connecting 5Ghz Network

I bought my Studio 1558 in the State two years ago. Recently, my workplace built 5Ghz network for getting faster speeds. 

I found that my laptop could connect to 2.4Ghz ('g') network only. It didn't find 5Ghz ('n') network.

I was confused because I thought DW1501 is capable of supporting 5Ghz band. 

After I found the old post on Dell Community, I realized I was misinformed by Dell's document a long time ago.

Due to international warranty transfer, I gave China Dell a call and requested for another wireless card that can handle 2.4Ghz and 5Ghz network.

They told me that they can do nothing except sending the replacement for the faulty parts.

I tried to convince them that I was misinformed by document. They asked me to prove where the misinformation is on Dell's website. 

I gave them a link of the post I found. They told me that the post on Dell Community is not qualified as a proof.

The only conclusion they can get from the post is "Staff claim that DW1501 is unable to see 5Ghz. That's it."