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4G LTE WI-FI DONGLES factory reset

JackBuilder

May 26, 2024
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I have a 4G LTE WI-FI DONGLE without any reset button. I have test points labeled GND, SRST, SVCC, SDAT, SCLK, RX, tx, DL, and VBUS. I need to know which ones to short together to perform a master reset to factory settings since I locked myself out of the device with a wrong keystroke when changing SSID and psky. The sequence is likely just as important.
 

bertus

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Nov 8, 2019
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Hello,

What brand and typenumber is your wifi stick?
Is there no reset button INSIDE the wifi stick?
Post some pictures from the front and back of the OPENED wifi stick.

Bertus
 

JackBuilder

May 26, 2024
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Hello,

What brand and typenumber is your wifi stick?
Is there no reset button INSIDE the wifi stick?
Post some pictures from the front and back of the OPENED wifi stick.

Bertus
Here are some pics of the board. I am capable of shorting the circuit, to gain factory reset, I just don't know the sequence or which test points to contact
 

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JackBuilder

May 26, 2024
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The only identifier is ufi823 on the printed circuit board.
There has to be test points and a specific sequence to achieve factory reset.
 

JackBuilder

May 26, 2024
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There is no "button" on the inside of the device. Only RF towers. There are however clearly identifiable test points to contact.
 

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JackBuilder

May 26, 2024
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It will not let me log into the device itself. After initial connection, using the dashboard, I changed the SSID and password. Have not been able to get back in yet. The only explanation I can arrive at is I must have made a mis keystroke when typing. However, this should be easily remedied through a factory reset. The only problem is this particular device does not have the standard reset button so commonly found on most devices of this type
 

Delta Prime

Jul 29, 2020
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The only identifier is ufi823 on the printed circuit board


I hope this helps.
ZTE launched the world’s first multi-standard USB modem, the MF820S2, and uFi, ZTE MF823, the MF91S. ZTE was also the first China mainland vendor to launch a 4G LTE smartphone, the Grand X LTE (T82)
 
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Delta Prime

Jul 29, 2020
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I changed the SSID and password. Have not been able to get back in yet.
Will wait till you get it back.
Your best chances to remember that password and missed keystroke!
You wish to know the secret to unlock it. that means you can unlock any of them... stolen or not for profit!
1649820818521.jpg
 

Delta Prime

Jul 29, 2020
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I started this post separately so you can easily delete it there's something you may not be aware of if there's no reset button on the dongle itself.
uFi, ZTE MF823
points labeled GND, SRST, SVCC, SDAT, SCLK, RX, tx, DL, and VBUS
SDAT, RX, SRST, GND with the jumper wire went in connected to ground the following sequence if you touch those test points will reset and unlock the unit. This is well known for Qualcomm chip and the Obama phone ZTE but illegal to do so in the United States.
Thanks again for the video. No computer needed...
 

JackBuilder

May 26, 2024
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I started this post separately so you can easily delete it there's something you may not be aware of if there's no reset button on the dongle itself.


SDAT, RX, SRST, GND with the jumper wire went in connected to ground the following sequence if you touch those test points will reset and unlock the unit. This is well known for Qualcomm chip and the Obama phone ZTE but illegal to do so in the United States.
Thanks again for the video. No computer needed...
Delta, thank you for the info. However, the video link must have been taken down as it is no longer available. With that being said, can you please elaborate. Do both of the aforementioned test points have to be shorted simultaneously? SDAT,RX. SRST,GND and for how long of Interval?
Your input would be much appreciated and thank you in advance for your time and effort
 

JackBuilder

May 26, 2024
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Need proper sequence and test points identified to hard reset 4G LTE Wi-Fi dongle with ZXIC PROCESSOR. no factory reset button on device
 
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