You can view the mobile size of the prototype by opening the file in a browser (couldn't reproduce in the Figma desktop app), then you open the browser Dev Tools and resize the area to view the mobile version of it.

It is not the best approach, but for me it worked. Also, Figma is probably going to add the mobile/desktop switcher in the near future, it is for sure a must to have.

Hey ​@Shivam_Tiwari2 — welcome to Figma Forum, and thanks for raising this! 💡

Checking in to make sure I’m on the same page with what’s going on here:

• Did the suggestion from ​@giliard help move things forward for you?
• So I can share a bit more context with the Figma Make product team: Could you describe a bit more about what you’re hoping to see happen? For example, were you expecting the prototype to automatically launch full-screen on mobile, similar to how a native app behaves? Also feel free to mention the make and model of the mobile device(s) where this would be most important for your workflow.

Appreciate any extra detail you’re able to share. 🙏🏻

I have created this login form for mobile in Figma Make (screenshot attached).
Now I want to open it in my mobile phone, and interact with the input fields on my mobile phone.
So I clicked on the “Share” button and “Copy Link”
Now when I open that link in my mobile phone’s browser then it doesn’t open it like an interactive prototype (screenshot attached)

I’m looking to open the file on mobile and no such luck, any interactivity would be appreciated