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Yealink Forums » IP Phone Series » Phone specific topic » T2xP Series » T20P cant upgrade from firmware 9.3.23.1

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T20P cant upgrade from firmware 9.3.23.1
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CWR Offline
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Post: #2
RE: T20P cant upgrade from firmware 9.3.23.1
I would try a small closed network to fix this.
Download the firmware to a thumb drive.
Install a router and connect a laptop and a phone only.

I know not everyone has these resources available - but it helps with figuring this out.

Also - the firmware 9.3.23.1... The second digit should be in the 70 range in my experience - so you might have a carrier specific firmware that is locked.
Who do you use for service?
Where did the phones come from?
Craig Reilly
MCSA, 3cx Advanced Certified
Scottsdale, AZ
(This post was last modified: 02-03-2015 05:06 AM by CWR.)
02-03-2015 05:01 AM
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RE: T20P cant upgrade from firmware 9.3.23.1 - CWR - 02-03-2015 05:01 AM

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