Minecraft – Friend can’t join the Minecraft world on PE

Go to options and turn on local multiplayer

Unfortunately, the Minecraft Pocket Edition multiplayer has always been fairly unreliable. It's improved in recent times, but still.....

Here's some things to try (do this on both devices if possible):

• Check both devices are connected to the same local network. Make sure you can open websites on both devices. Sounds stupid, but a lost connection is probably the issue.

• Close MCPE, open the app switcher on your device, remove it from the list by swiping it away, then open the app and try again.

• Turn the device completely off, then on again, then open the app and try again.

• With an iOS device, hold down all the buttons (home, power and volume) on the device at the same time. After some time, the screen will go blank. Continue holding the buttons until you see the Apple logo. Release the buttons straightaway when that appears. Open the app and try again.

• Try again later, or even the next day. It sounds terrible but does in fact work sometimes.

• (Most drastic option, last resort, all MCPE worlds on that device will be erased unless you back them up.) Uninstall MCPE and reinstall.

Let me know how that goes for you.