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V84.0.140, downgrade no longer possible?
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avayax Offline

Posts: 113
Joined: Mar 2015
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Post: #9
RE: V84.0.140, downgrade no longer possible?
(01-12-2021 01:55 AM)Yisroel_MongoTEL Wrote:  They don't have this for most other phones, so your conspiracy-theory about backdoors doesn't make sense.

The lack of technical communication from Yealink is indeed frustrating. If they made such tough restriction at least say why! But communication is not a new issue from them Sad

It perfectly makes technical sense that an upgraded that changes something major low level in the firmware results in a restriction not to downgrade. I've seen it with other manufacturers as well (Fanvil Doorbells are a recent one that come to mind.)

But what is the major change in .140 that warrants blocking firmware downgrades?
Besides these T23G phones do not seem to get V85 firmware upgrades, so my guess is they're going eol?
01-12-2021 08:44 PM
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RE: V84.0.140, downgrade no longer possible? - avayax - 01-12-2021 08:44 PM

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