How do I unsubscribe from facebook on mobile?

[Good]

I was using facebook on my laptop and I don't know what happened to my account setting,I am getting all facebook notification on my mobile and most importently even if I don't make a call my balance is decreasing automatically.Please Help!!!!
I don't want my balance to decrease
how do I unsubscribe from facebook?

[Ashour]

open facebook App -- click on the three bars on top left corner of the app -- Scroll down to Account settings and tap to open it ---- click on the general from the window that pops out ---- click deactivate under account.

[Daniel]

Go to the Facebook App on the left Side of the Screen you will See a Box with three Lines Click on it than Go to Account Settings than Click on Deactivate and you Can unsubscribe from Facebook Using your Mobile Device

if you Want a Full Permanent Delete With no Recovery Option than Go To This Link

https://www.facebook.com/help/delete_account

Do Not Login for 14 Days and it will be Deleted