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Proximity Sensor Does not function.

Dave Id
on 11/12/18, 2:23 PM 914 views

Meaning phone never blanks screen during calls. I have tried calibration tools, testing tools, they all read a zero value for the proximity sensor. Unihertz sent me a ussd code to try running to get into the phone diagnostics (*#*#33#*#*) to calibrate, but the code does nothing on my Atom. Anyone else experiencing this issue? I'd hate to factory reset just to find out it was a hardware fault. Does anyone know another way into the diagnostics?


Awesome tip. Worked for me. I kept putting a call on hold because it would not shut the screen down. This tip works and did the trick! Thank you for that.

FYI - if you test telephony in the same diagnostic app, it calls 911 but displays “Emergency” on the screen. That was embarrassing. Lol

Duane Morris
on 12/7/18, 1:49 PM

Dave Id
On 11/21/18, 3:31 PM

So, I had to do a factory reset on the device in question, that allowed me to enter the diagnostics and calibrate the sensor. Now it is working properly.

On 11/19/18, 11:59 AM
Opening the phone dialer and dialing *#*#33#*#* worked for me, opening up a screen with four big buttons on it: auto test, single test, aging test, restore factory setting.

Under "single test" there is an option called "Distance Sensor" and I could change it from 1.0 to 0.0 by moving my hand close to the earpiece. There is an option called "Distance Calibration" where you can reset the sensor.

Upon trying "Distance Calibration" I made the mistake of putting my hand right up to the screen when it asks you to put an obstruction in the way - this made it not sensitive enough, and afterward, it was hard to change the 1 to a 0 in the "Distance Sensor" test. When doing the "Distance Calibration" and it asks you to put an obstruction in the way, put your hand 2-3cm from the earpiece. That seems to produce a reasonable calibration.

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