Modern Saudi Arabia phone formats

We have a client with a number 966 50 XXX XXXX which wasn't recognized by Phony so I went looking if there is any format changes and seems Phony uses old one that has been updated few times already.

Apparently, new formats should be
+966 5X XXX XXXX for mobile
+966 01X XXX XXXX for land lines

Here is some resources I found
http://www.citc.gov.sa/English/MediaCenter/awarenesscampaigns/Pages/PR_AWR_004.aspx
http://en.wikipedia.org/wiki/Telephone_numbers_in_Saudi_Arabia
https://answers.yahoo.com/question/index?qid=20090303142622AAQBoZ0