[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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Lee-Dreyer Offline
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Posts: 4
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Post: #1
Downgrade Firmware
Normally it is not recommend to do a downgrade of the firmware.
Can I downgrade from ex. 2.70.0.150 to 2.70.0.103 for 3CX?
Request from the 3CX support.
10-07-2013 07:05 PM
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Yealink Support Offline
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Posts: 2,684
Joined: Dec 2012
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Post: #2
RE: Downgrade Firmware
Hi Lee
Of course,you can downgrade from 2.70.0.150 to 2.70.0.103.
Indeed,Yealink and 3CX are long-term strategic partner,so 2.70.0.150 can also support 3CX well.
10-11-2013 09:08 AM
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rick@fireflyearthworks.com Offline
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Post: #3
RE: Downgrade Firmware
How can i downgrade from 28.80.21.34 to your latest on your site of 66.88.25.9
01-29-2021 02:26 AM
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complex1 Offline
3CX Adv. Cert. Engineer
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Posts: 1,162
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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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rick@fireflyearthworks.com Offline
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Post: #5
RE: Downgrade Firmware
(01-29-2021 03:40 AM)complex1 Wrote:  
(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.

Do you have the firmware for a T46g on the web site or can we get a copy emailed to us? I do not see that phone listed....
01-29-2021 06:36 AM
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Yisroel_MongoTEL Offline
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Posts: 178
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Post: #6
RE: Downgrade Firmware
(01-29-2021 06:36 AM)rick@fireflyearthworks.com Wrote:  Do you have the firmware for a T46g on the web site or can we get a copy emailed to us? I do not see that phone listed....
This is the page on the site for the T46G model:
https://support.yealink.com/documentFron...umentId=10
01-29-2021 10:10 PM
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