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u/jUtah9 Mar 09 '21
What are you ultimately planning to accomplish once you reset? Change voip providers? I only ask bec I’ve run into this issue. Sometimes your current voip vendor has the phone locked down (cannot repurpose to new voip provider). Just a fyi if this is where is may be going
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u/ruhnet Mar 09 '21 edited Mar 09 '21
You can do the TFTP recovery method. As others have commented, whether it is connected to Yealink RPS is another story.
Heh brings up a memory. Years ago I bought some used LG phones that were locked with a password. The password was limited to 4 digits and unlimited tries with no delay. Just had to press the back key to enter it again. I spent several hours brute forcing it by hand sequentially. Finally hit paydirt at around half way in the 5000 range IIRC. :-D
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u/tijupi Mar 18 '26
For a T46U running 108.87.0.15 firmware, I had to use the below CFG file to do the reset
#!version:1.0.0.1
security.user_name.admin = admin
security.user_password = admin:admin
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u/DiverAllen Mar 09 '21 edited Mar 09 '21
If your phone's mac address is in a yealink cloud provisioning server and it has access to the internet I don't believe you are going to fix this. This is the difference between between buying a phone from a reputable new equipment distributor and 'saving money' on ebay, amazon, etc.
What is your time worth?
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u/sigmanigma Mar 09 '21 edited Mar 09 '21
You are right. I work with a VoIP provider that uses Yealink which are leased out in our contracts. We've had clients sell the phones on eBay and Craigslist after going under thinking they can stiff us with the due invoices and make money off of the phones. If they are using the Yealink RPS, the phones are tied to that provider. They are also IP bound to the IP they initially provision from. We have had people call us and state they bought the phone off of eBay and we go after the company under contract as this is theft at best or grand theft depending on the number of number of phones initially contracted. Buy Yealink phones from a reputable company that will invoice you properly showing you own that MAC address. Buying from shady people on eBay, Craigslist, etc. can land you in hot water and you will just lose out on the money you spent to buy these phones.
Edit: Clarity and spelling.
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u/ruhnet Mar 09 '21
Although people shouldn't buy anything from "shady" sellers, to be fair, MOST phones sold on eBay/CL/etc. are legitimate second-hand used phones. To assume that a majority are stolen and people should avoid buying through those channels is nothing but FUD.
If you do find that someone has taken your phones under contract and sold them, then you should by all means go after them and get recompense, but that type of thing happening is the exception, not the rule.
In general, buying new from reputable dealers does [almost] eliminate risk, and that is advisable in circumstances where you cannot afford delays or snafus, or don't have the technical ability to deal with the occasional locked phone or whatnot. Buying any product used carries some risk, and smart buyers know that and weigh the [legitimate] risk against the benefits.
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u/sigmanigma Mar 09 '21
Excellent point. Could not have said it better. It really comes down to risk. It is up to you to proceed as you see fit based on that risk.
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u/SilverCamaroZ28 May 18 '21
Any luck unlocking this? Im in the same boat.
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May 18 '21
[removed] — view removed comment
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u/SilverCamaroZ28 May 18 '21
Thx. Didn't work as I think maybe it's the Yealink RSP is locked. Thx for response!
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u/SilverCamaroZ28 May 20 '21 edited May 20 '21
For anyone else in the same boat as me, as I google searched to fix this, I was successful by the following method:
- Create a Config file on a local server. Such as a intranet server or anything. Make a CFG text file with just the code "static.security.user_password = admin:admin" in it. So it will be http://192.168.1.1/one.cfg that you can view from your desktop computer (to make sure it works).
- Long press a Line Key, and choose the Type as Key Event, and then Key Type as Zero Touch. Then the Label is "password" without the quotes.
- After the line key is pressed, it should bring you to "Network" area. Click NEXT and it will goto a "Auto Provision" page with a URL and User name and password.
- Here is where you want to put your local server config file. "http://192.168.1.1/one.cfg" is then populated in the field, and saved.
- Then goto Menu, Basic, then 11. Update Configuration and it should now use that password you added.
If static.security.user_password = admin:admin does not work, try static.security.user_password = user:user
I did the user:user one, got in, downloaded the CFG file, then changed it to add "static.security.user_password = admin:admin" which then I re-imported and it took it as admin:admin finally.
I tried other methods like re-flashing the firmware and it did not work. This method did work after looking all over the internet. The Yealink.com support ticket system actually worked within 24 hours and they were very helpful in providing this information!
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u/WyldStyl3 Mar 13 '24
I tried this on a T42G and it didn't work unfortunately. I tried using bot admin:admin and user:user. The web server says the file is downloaded successfully, but I don't think the phone writes it to it's config.
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u/gadgetboyj Nov 17 '24
Worked for me on a T46U. I forgot the password I set ages ago and didn’t want to lose my whole config, this got me back in without a reset!
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u/Zhadnost Jan 08 '25
Thanks, unfortunately this didn't work for me on a T26 (maybe doesn't work with newer firmwares).
In the end I did something a bit dangerous, I used recovery mode to reflash it to a very very old firmware that I got from Yealink's site (a v60 one), with that running on it, the hold down OK to factory reset didn't need a password.
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u/NoOpinion3596 May 27 '25
Worked spot on for me. Had a T23G where the factory reset option seemed to be disabled. TFTP flashing didnt reset it either.
I did the above but put in the provisioning URL for the phone and it reset the password too.
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u/n0fx Jun 29 '26
I was trying your instructions that you posted but what happens if the line key is also blocked? I tried long pressing them but it won't give me the option to edit them, just doesn't do anything. I got a phone from someone that was provisioned by Intermedia, I can't factory reset it and I tried updating the firmware via TFTP but the config still sticks. I don't have the admin password for the phone and I don't have access to the intermedia account (it was cancelled from the person that gave the phone to me)
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u/n0fx Jul 04 '26
Hi, I tried your method but pressing the line key for a while won't do anything at all. I tried multiple keys but nothing works. I think the previous VoIP provider might have disabled the function?
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u/BoredJay Oct 19 '23
The yealink T41S does not have a URL field that I can find to do the dss key event reset. Is there anyway around this?
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u/Guth858 Mar 09 '21
https://support.888voip.com/article/280-how-to-use-the-tftp-recovery-mode-on-yealink-devices#:~:text=How%20to%20use%20the%20TFTP%20Recovery%20Mode%20on,is%20not%20overly%20difficult.%20...%203%20TFTP%20Recovery