Huawei Mediapad M5 Faqs page 5

2. If there are smudges on the surface of the fingerprint sensor, clean the fingerprint sensor
in a timely manner since smudges like oil and water affect the unlock success rate.
3. If you are using a non-standard charger to charge your phone, the charger may interfere
with the fingerprint sensor, changing the collected fingerprint image and resulting in
fingerprint unlock failure. It is recommended that you remove the charger and try again.
In addition, it is recommended that you replace the charger with a standard one. If the
issue persists, take your device and the proof of purchase to an authorised Huawei
Customer Service Centre for assistance.
4. When you get up in the middle of the night or in the morning, the skin of your fingers
may be very smooth. This is because your fingerprint patterns get shallower when your
fingers are drier and have slower blood circulation. This change of fingerprint pattern
may affect the unlock success rate. You can check whether the fingerprint unlock
function is normal at other times. You can also enrol several fingerprints and try using
other fingers to unlock the screen.
5. During cold periods of the year, finger skin is prone to peeling, wrinkling and cracking,
which produces new fingerprint patterns. It is recommended that you use different fingers
to unlock the screen. You can use skincare products to keep your skin moist and prevent
it from peeling or cracking. It is also a good habit to wash your hands with warm water. If
you are suffering from dry skin, exercising or using warm water to wash your hands can
help relieve the problem.
6. If your fingerprints are shallow, do not use your fingertip to touch the fingerprint sensor
but try using the pad of your finger to cover the whole fingerprint sensor and its edges, so
as to enrol a clear and stable fingerprint image. Because the features of a fingerprint are
concentrated on the pad of the finger, pressing this part of the finger on the sensor has the
best chance of unlocking the screen. In addition, you can enrol several fingerprints and
use the one with the highest unlock success rate.
7. When using the fingerprint unlock function, fully contact the fingerprint sensor. If you
swipe your finger, the collected image will be unstable and the unlock success rate will
be low. For models with the fingerprint sensor located on the side of the phone, such as
the Honor 7i, use the pad of a finger to cover the sensor when unlocking your phone,
since pressing your finger in a vertical direction with the sensor will result in smaller
contact area, which lowers the unlock success rate.
8. If the phone vibrates but the unlock fails, it indicates that the fingerprint sensor has
identified your finger but there is a mismatch and the fingerprint unlock has failed. You
can follow the preceding steps for troubleshooting. If your phone does not vibrate when
you unlock it using your fingerprint, try again from another angle. If your phone still does
not vibrate, restart your phone and try again. If there is still no vibration, back up your
data and restore your phone to factory settings. If the issue persists, take your device and
the proof of purchase to an authorised Huawei Customer Service Centre for assistance.
Risks of rooting your device
It is not recommended that you root your phone due to the following potential risks: