How do you make a nether portal in minecraft Xbox 360 edition?

Answer 1

you cant make one on pocket edition because you dont have obsidian and flint and steel.
You cannot make a portal to the nether in minecraft Pocket editon, but you can in x box and computer versions

Answer 2

There are 2 ways to do it.

First way: Go down to the depths of the world and find some Obsidian. You must have a diamond pickaxe. Mine 14 of them, or 10 if you want to leave out the corners of the portal. I like the look of the full portal best though. The portal is 4 blocks wide and 5 blocks tall. Now get a flint and steel and light the inside of the portal. And there you go.

Second way: If you find an easy lava pool to access when you want, as well as some water (you can dig a 2x2 hole that's 1 deep and fill it up with water and you'll have infinite water) and use something like cobblestone to build a hollow cast of the portal and put in a bucket of lava then water. Repeat until you fill up the entire cast. Now remove the cobblestone cast with a pickaxe and light the inside of the portal with a flint and steel.