You can know stores that selling MBC channels Decoder, by choosing the country and the city that you are living in, a list with the closest stores will appear.
From anywhere in Saudi Arabia:
+966112689191
From anywhere else:
+9714 390 9889

Country :
 
City :
 

To activate your decoder, please click here

(You will NOT be able to watch MBC channels in HD if you do not activate your decoder)