I cannot connect to my friends world on minecraft pocket edition.

in that case you should try to reinstall both games, that may be happening because of the recent problems with servers

dear sgal33,

Thanks for your post.

You should try to see the statut of your NAT.

if the NAT is close try to open all ports for minecraft pocket edition.

Why i cannot playing server in minecraft pocket edition

I leave you a link to the Minecraft help page, perhaps some solution is found here.

Please check that you set your worlds in the settings to allow friends to join your worlds.

Also go to
https://account.xbox.com/settings and check that you are allowed to play online multiplayer and view other people's creations.

If you go to that page and get a text explaining how to add a child account to a parent account, you need the help of an adult.

The adult should then go to
https://account.microsoft.com/family and add your account to their family account, if not already done so.

Ask the adult to go to https://account.xbox.com/settings then and sign in with their parent account. Then have them select your child account and have them make the necessary
changes.