[YMCS/YDMP Free Trial Program]Yealink would like to offer Free Trial Program of Yealink device management service for our current eligible customers. You can see the details below.
https://www.yealink.com/ydmp-freetrial-2020


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Downgrade Firmware
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complex1 Offline
3CX Adv. Cert. Engineer
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Posts: 1,157
Joined: Jan 2014
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Post: #4
RE: Downgrade Firmware
(01-29-2021 02:26 AM)rick@fireflyearthworks.com Wrote:  How can i downgrade from 28.80.21.34 to your latest on your site of 66.88.25.9

Hi,

You can’t.
Firmware 28.xx.xx.xx (T46G) belong to another series as firmware 66.xx.xx.xx (T4xS)

Hope this will help.

Kind regards,
Frank.

I am not an employee of Yealink.
Dutch is my native language, not English. Apologies for my imperfect grammar.
Please do not send unsolicited PM messages. I will not answer them.
01-29-2021 03:40 AM
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Messages In This Thread
Downgrade Firmware - Lee-Dreyer - 10-07-2013, 07:05 PM
RE: Downgrade Firmware - Yealink Support - 10-11-2013, 09:08 AM
RE: Downgrade Firmware - complex1 - 01-29-2021 03:40 AM
RE: Downgrade Firmware - Yisroel_MongoTEL - 01-29-2021, 10:10 PM

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