How do I transfer xfinity mobile phone and number to new carrier?

I was trying to follow the directions here:

"How to change or cancel your Xfinity Mobile service"

https://www.xfinity.com/cancel/mobile

    Under "Need help transferring your phone?"

1. Sign in to your Xfinity Mobile account and go to the Devices tab.
2. Select the device associated with the phone number you want to transfer to a new carrier.
3. Scroll down the page to transfer your number, cancel this line.
4. Select Learn More.

But I didn't even see anything that said "transfer your number, cancel this line."

UPDATE: I had to click on the devices tab to see "cancel this line", but now I need to know how to know if number lock is on and turn it off it is. I'm also having trouble finding the Xfinity app for Android that I seem to need to do that.

UPDATE 2: My device is not compatible with the Xfinity App. What can I do? Visit an Xfinity store?