This has been a problem for me for a long time now. Ever since xbox live was integrated in Minecraft (Better Together update) I was never able to use this feature for a simple reason, it just wouldn't work. I've tried playing with many friends with different devices and it still wouldn't connect me into their worlds or vice versa. My internet is fairly fast and my device is up to date. Is it something to do with the country I am in, because my friends from other countries don't have this kind of problem. I bought Minecraft legit and am signed in to beta programme and I live in Philippines. Please tell me if there's something I don't know or if it is a bug, please fix it soon. Thanks!
PS. My device is Asus Zenfone 3 max, Android 7.0