Admin log in not working

[daniel@gtechserv.com]

(02-24-2016 04:51 PM)Klaus_Yealink Wrote:  Hi,

First of all,would please tell me what's the firmware does the phone run?

if it's custom version,please contact the phone provider for help.

For this issue,please long press the "ok" button,then there will show a warning sentence,select ok,then the phone will reset,

after that,please try to use double "admin" to access the web UI!

if it can not work either,please contact the server provider or phone provider for help,because if you have a DHCP or PNP

enviroment,once you reset the phone,phone will send request to the server,and download the cfg files again.

so if there is sentence about password and username in the cfg file,please delete it,then test again!

Any question,please contact me freely!

TKS&BR

klaus

So how do you delete the cfg file from the phone itself?