I've got a handy little Samson GoMic, its powered via USB and it works great, but so far I havent found a way to get it to function via USB, either a standard cable or the multi-plug cord that came with the phone.
Is there no USB input support?
A screen protector is always on, but cases get in the way. Had my stupid Iphone 5 for over two years and never put a case on it, and even though I like the S5 1000 times more, it'll still be naked and free.