Temporary solution for Facebook download
As many of you I have also been going thru the same problem as most of you ever since Facebook showed a new update. After deleting my Facebook app & not being able to reinstall it I changed my time zone to London & tried reinstalling the Facebook app. Surprisingly.. It worked! Now I have changed my time zone back to my own & it is working perfectly fine.. Try it! I hope this helps most of you out!:)