I'm going mad with my S4 running 4.4.2. I setup a VPN (two of them) without problems. Now when I try and enter the VPN screen I get asked for my credential storage password (which of course I don't have and have never set). None of the above work arounds work. I've tried a screen lock pin, password, pattern, none. I've cleared the credential storage from the security options - which is now greyed out. I've tried getting the password wrong until it clears it, yet then it just keeps asking for a password which I still don't know and can't get right. It's not asking me to set a new one either. My carrier (3 Ireland) have recently upgraded me to 4.4.2 - I never had this problem on 4.2. So I appear to have an S4 that is incapable of accessing the VPN feature! Any clues/advice before I throw it out the window?