One of the most technologically advanced chips in modern iPhones is the TrueDepth module . This is the same “monobrow” above the display, into which the camera, light and proximity sensors, an infrared emitter, a similar sensor and a projector of points fit.
Together, all this stuffing is the most advanced scanner of the user’s face in a mobile device. None of Apple’s competitors have come close to such a solution so far.
Unfortunately, the module does not always work correctly and can fail. Now we will understand how to fix the situation.
Face ID has a number of limitations.
First, remember the limitations of this method of unlocking and its features.
The first . Face ID works only in portrait orientation
Only new iPad Pro tablets are able to recognize the user’s face in both vertical and horizontal orientation of the gadget. To trigger the sensor on the iPhone you need to keep it extremely smooth. Minimal deviations to the sides are possible, but with strong sensor it may not work.
This also applies to unlocking the iPhone on the table. The device should be raised, pointing the screen at yourself, and not trying to look at the top, exposing the chin and lower part of the face.
The second . Face ID sensor does not work if light hits it
Bright lighting or direct sunlight that falls on the sensor because of the user’s head may not allow the scanner to correctly recognize the face. This is possible when light hits the screen at a certain angle.
Third . Face ID can sometimes just turn off.
This happens for security reasons in a number of predefined scenarios. For example, if you read the face incorrectly five times in a row, when you restart the smartphone or activate the SOS mode.
If the iPhone has been lying unlocked for too long, or if it has activated the missing mode, the scanner will also be turned off.
Face ID will work immediately after unlocking the iPhone with a password.
Fourth . The scanner needs to see the user’s eyes, nose and mouth.
It is for these main points that the complex mask of the litas is built, which acts as a key for unlocking. All sorts of accessories can cause a poor response of the gadget.
How to improve the performance of Face ID on the iPhone?
There are several recommendations from both Apple employees and advanced users who can seriously improve scanner performance.
1. Do not use cheap screen protectors and screen glass.
In most cases, any protection covering the front of the smartphone will not affect the work of Face ID at first.
After a certain time, inexpensive films and glasses may peel off, peel off, or slightly move away from the screen. This can lead to distortion of the infrared signal from the sensors and poor sensor performance.
2. Periodically wipe the front of the iPhone
Banal advice, but the correct cleaning of the front panel is the key to good performance of both the Face ID scanner and the device’s front camera.
3. Keep your iPhone at a distance of 30 to 50 cm from your face
It is this range that is recommended to use for the fastest response of the sensor. Do not bring the device closer to your face and do not move it to the fully extended hand.
4. Take off glasses or other accessories.
Some users face Face ID problems when trying to unlock a device with glasses. The problem lies in the protection from ultraviolet radiation. Certain models may not transmit infrared radiation, as a result, the iPhone does not find some of the important points on the user’s face and does not remove the lock.
Sometimes scarfs, cravats and bandanas covering part of the face interfere with triggering.
5. Change the angle of the iPhone
You should not wait painfully until the scanner performs several unsuccessful reads and you have to manually enter the unlock password. Gradually raise the iPhone to eye level and align it parallel to the plane of the face.
It changes its position relative to the sources of illumination, so that the direct rays of light can fall on the front surface of the smartphone.
If nothing helped, how to reset Face ID recognition?
If the iPhone has become very often mistaken when recognizing a face, requires entering a numeric password and hardly recognizes you, you need to try out the following:
Reconfigure Face ID
Go to Settings – Face ID and passcode , enter the code for unlocking the gadget and disable the scanner using the Reset Face ID option . Re-enable it and rebuild the sensor.
Sometimes reconfiguration solves problems with frequent sensor failure.
Add an alternate look
As previously, users added several fingerprints for one finger to the Touch ID, so you can add a second portrait to the Face ID.
Simply open the Settings section – Face ID and passcode – Alternate appearance and re-scan your face.
It is better to ask a couple of faces with all possible differences: with and without glasses, before and after the piercing, clean-shaven and with a thick beard.
Turn off attention detection
You can configure the iPhone so that it does not require the user’s immediate attention to the screen to unlock. It is enough to show your face to the scanner, but not to look at the gadget to trigger the sensor.
Of course, this slightly reduces protection, allowing, for example, friends to unlock the gadget using the sleeping owner. In practice, such a shutdown reduces the delay in triggering and minimizes Face ID errors.
And still. Can a face id just break down?
Yes , like any other module in the iPhone. Usually, a similar error is seen by the owners of the failed scanner.
Unfortunately, the repair will be very expensive. The Face ID module, like the Touch ID, is tied to the motherboard at the program level and will not work if the unit is replaced with a similar one.
You should change the bundle of the motherboard and sensor, which is almost comparable to the purchase of a new gadget.
At the same time, the Face ID breaks most often when mechanical damage or ingress of moisture occurs. Neither is covered by warranty.
Be careful and careful with your iPhone.