My wife has an S7. Today, she tried to unlock her phone with the PIN and it told her it was invalid. She tried a few more times with no luck and now it's telling her she only has 5 more tries left. She used the phone yesterday with no problems. She's certain she hasn't changed the PIN. She never did the fingerprint thing, so that's not an option. Anything else she can try? We are on Verizon. Would taking it to a Verizon store do any good? Thanks. - Eric S.