Failed to join meeting on laptop and another smartphone.. only 1 device can run the meeting

Hello @Lii , 

 You can test out the functionality of your devices by using this support article. 

https://support.zoom.us/hc/en-us/articles/115002262083-Joining-a-Zoom-test-meeting

To my knowledge, you can have up to four devices on the same Zoom profile at one time in a meeting. 

I hope this helps!

B!