Ever since my s5 updated to Lolipop 5.0, my phone has been glitching, espeacially on the lock screen. Where i enter my pin, the numbers are squared and white
Welcome to Android Central! This is a relatively common complaint for Samsung devices. It usually goes away after a reboot. If it doesn't, then try wiping the cache partition: http://support.t-mobile.com/docs/DOC-10404