Wondering why your data plan drain so quickly in your phone? You may notice that Facebook Auto Play Videos now and it can cost a bomb in your phone bill if your data is on. I have experience with iphone and it really suck your data (with data setting on) even if you are not using your data and once your data plan got exhausted your provider will still charge you unless you turn your data off.

 So if you are using a data plan that is 1gb or less and is using an iphone
>Go to your phone Facebook setting
>go to 'videos and photos'
>select the auto play function
>select 'on wifi connections only' or select based on your preference

If using Android phones go to
>Help & Settings
>go to> App Settings >
>click>>Videos play Automatically
>choose your preferred settings

I love using Android phones, even when my data is turned on it doesn't consume any data unless i use it.