[AC Question]

I'm having the same issue this morning.

I can't use my keyboard function at all, all it says is "Unfortunately, Samsum keyboard isn't working" I've restarted my phone tons of times and still nothing

[B. Diddy]

Welcome to Android Central! Go to the App Manager and select Samsung Keyboard. Clear Cache and Clear Data. Now try again.

If that doesn't work, try booting into Recovery and wiping the cache partition, which won't erase any personal data: http://forums.androidcentral.com/sam...2-s3-tab2.html

You could also try installing another keyboard, like Google Keyboard, and make that the default.