How to stop unwanted Facebook updates coming to my iPhone as text messages?

I like getting message about something I have posted or liked but I have started getting messages about a page I like. I do like reading the posts on FB but not as a text on my iphone. I do not know how this started and it seems to have started in the past week. Any info on why this started, how to change it and if you can select which post show up on your iPhone would be wonderful.

Open your phone settings
Tap Notifications then tap facebook
Tap and slide "Notification Center" to On
Set "View in Lock Screen" to off
Set "none" to Banners or Alerts

or
go to fb app
Tap Account Settings > Notifications > Mobile Push
Check the things you want to get notifications about or un-check the things you don't want to get notifications about.

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