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Blog1 min read

Is there an iPhone sensor test code? Testing without one

iPhone has no sensor test code open to users; *3001#12345#* only shows network information. You can test the sensors in daily use: the screen going dark on a call shows the proximity sensor, Auto-Brightness shows the ambient light sensor, and screen rotation and the Level tool show the motion sensors.

Cep Market Repair TeamIn Kadıköy since 2006
Key points
  • iPhone has no sensor test code open to users.
  • On a call, the screen should go dark when the phone is near your ear.
  • Auto-Brightness shows the ambient light sensor works.
  • Screen rotation and Level in the Measure app test the motion sensors.
  • Test Face ID by trying to set it up in Settings › Face ID & Passcode.

01Testing sensors without a code

SensorHow to test
ProximityHold the phone to your ear on a call; the screen should go dark
Ambient lightChange the light with Auto-Brightness on
Gyroscope and accelerometerRotate the screen, open Measure › Level
Face IDTry setting it up in Settings › Face ID & Passcode
CompassOpen the Compass app and turn the phone

02If a sensor fails

  1. Clean it. Wipe the top of the screen and the sensor area.
  2. Remove the protector. A thick or tinted protector can cover the sensor.
  3. Update and restart.
  4. Diagnosis. If it started after a drop or screen replacement, the sensor cable should be checked.

Menu names vary by iOS version.

iPhone Face ID not working: Face ID repair

See also iPhone touch screen test and iPhone proximity sensor setting.

Brand › Model › Repair listChoose your model, ask about the faultiPhone models

03How to get your phone to us

Visit our store

Hasanpaşa Mh. Söğütlüçeşme Cd. No: 192 (opposite the mosque car park), Kadıköy. Monday – Friday 09:00 – 20:30 · Saturday 09:30 – 20:30 · Sunday: Please ask.

Send it by post

Free two-way shipping with our contracted carrier from anywhere in Turkey. Send the device without its case, in a well-protected box, with a note giving your phone number and the fault.

Motorbike courier

Within Istanbul you can send your device by motorbike courier; just send us your address and the fault on WhatsApp.

FAQ

Frequently asked questions

01

What is the iPhone sensor test code?

There is no sensor test code open to users. Sensors are tested on calls, with Auto-Brightness and with screen rotation.

02

What if the screen does not go dark on calls?

The proximity sensor may not be working; remove the protector and test again, and if it continues, have it checked.

03

Why does a sensor fail after a screen replacement?

The sensor cable moves with the screen; if it is damaged or not seated, the sensor stops working.

04

Will a sensor repair delete my data?

Data is usually preserved during a repair; still, you need to back up your data before the repair starts (backups are the customer’s responsibility).

Customer reviews

What our customers say

★★★★★

Today we had an original battery replacement on our iPhone 14 Pro done by Can, and we thank him very much for his kindness, his speed and his professional support. You can come with no question marks in your mind. I recommend it 👍

Özgür Can K.Customer review · Translated from Turkish
★★★★★

They replaced the battery of an iPhone 11 in 20 minutes and handed the device back.

Selçuk S.Customer review · Translated from Turkish
★★★★★

They replaced the screen of my iPhone 17 Pro Max with an original one within an hour. Emir and Kerem looked after me very well. An amazing business.

Ali E.Customer review · Translated from Turkish
★★★★★

Thank you, I had my device repaired: front glass replacement on a 17 Pro Max within an hour.

AhkCustomer review · Translated from Turkish
★★★★★

My brother Kerem welcomed us wonderfully; he truly knows the whole workshop by heart. Can, my doctor, left his mark on an iPhone that nobody else could fix. Thank you.

Saidovski M.Customer review · Translated from Turkish
★★★★★

I had the front glass of a 14 Pro Max replaced and I am pleased. Well done.

Alp Tunahan T.Customer review · Translated from Turkish
★★★★★

I had the screen and battery of my 14 Pro Max replaced and I am very pleased. Thanks for your work.

Oğuzhan O.Customer review · Translated from Turkish
★★★★★

I think you will be pleased with their approach, their helpfulness and their care.

Our customerCustomer review · Translated from Turkish

From our customers’ reviews. All reviews

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Is an iPhone sensor not working?

Sensor faults are diagnosed free of charge. Send us the model on WhatsApp.

+90 537 958 02 02