How to forward a port on minecraft PE?

My friend lives in Texas and we use to play a game together on our phones all the time. That game was then deleted off the AppStore. Recently, about a half year ago actually, we both got minecraft. Though we were disappointed that we couldn t play multiplayer. Now with the new 1.11 update I found that we can add servers. I've done everything, and searched everything up. The only thing I'm incapable of doing is open a port so we can connect. I have an IPhone, is there any way I can open the port so my friend can join my server?

I would think it would use Game Center, not port forwarding, because that's too advanced for little kids who call themselves "mobile gamers".

Read a guide on the Internet.

It depends on what device you are using there are many android YouTube videos on how to portforward