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i have yealink t23P ip phone and i have problem in display time i dont have internet just local network and there is no ntp server , so i enter date and time manually but the problem when reboot the phone the setting of time manually reseted to automatic via ntp and area
please help me to solve this problem

thank you
HI Sir,

As the phone do not contain a battery in it, so it can not save the manually configure time. That is by design.

Are you verifying the time is set correctly on-device and via the exported config? Not just the web-gui option?

In my experience, when provisioning a specific time, it is not uncommon for the web-GUI will not reflect the settings you provisioned but if you export the config, you can see it was set correctly and working just fine.

Perhaps set the time and check again.
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