I can't play multiplayer with my friend even if he is sitting next to me with the same device.

I have a video but it is 47 mb that’s why I can’t put it .

Thank you for your report!
We're actually already tracking this issue at MCPE-36190, so I will resolve and link this ticket as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

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When will you fix this bug? In the next update or later?