I have a Fanvil C600 V1, I used the instructions at this link https://www.3cx.com/sip-phones/fanvil-c-series, performed a factory reset and installed the C600 HW1.0 firmware from the link in the document. The web interface now shows 13.306.238.28D The issue is in step 8 you key in the user name and voicemail pin as the password. I flubbed this step and keyed in the sip password. My question is how do you get back to the authentication view? I tried a factory reset, clearing everything and also re-flashing the same firmware. Thanks in advance.