Wanna see dual sim functionality in action

[Maged Samuel]

Hi,
I'm looking forward to buy an HTC dual sim phone (most likely it will be the HTC ONE E9+, when it is released). Since this 'll be my first dual sim phone, I wanted to see any video showing this dual sim functionality but I couldn't find any on e.g. YouTube. Is there any video review of this feature on HTC phones so as to see it in action before I buy?

Thanks