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I found my T21P E2 shows OFFILINE once upgrade to the latest firmware 52.84.0.125 but it was no problem when use 52.83.0.35.rom . May I know if V84 is not support YMCS for T21P E2 anymore ?

(08-31-2020 03:19 AM)erictam Wrote: [ -> ]I found my T21P E2 shows OFFILINE once upgrade to the latest firmware 52.84.0.125 but it was no problem when use 52.83.0.35.rom . May I know if V84 is not support YMCS for T21P E2 anymore ?

Dear Customer,
As you can see from our support website, the firmware above 52.84.0.90 does not support YMCS any more, please find below link for the special firmware for the entry level phones that support YMCS based on the newest firmware version.
https://drive.google.com/drive/folders/1...sp=sharing

Any question, please feel free to create a ticket for us at http://ticket.yealink.com/
Best Regards,
Brenda