Iphone xmax is the dual sim?

Hey there Kunal!

Yes, indeed it will be dual sim. Here's a link to the technical specifications iPhone XS - Technical Specifications - Apple

From the website, if you scroll down, you will see the section SIM card, it says,

• Dual SIM (nano-SIM and eSIM)11
• iPhone XS and iPhone XS Max are not compatible with existing micro‑SIM cards.

Hope this helps!

Yes, the iPhone XS Max will have dual-sim capability.

Hi there, im wondering wether or not the use of only 1 physical nano Sim is possible on new iphone?

Yes, you can use just the nano-sim on the new phone. The eSim feature for adding another number elsewhere isn't even active yet at launch.