Huawei Mediapad M5 Faqs page 6

Rooting may cause your phone to stop working optimally and/or certain features to malfunction.
In addition, since the third-party firmware is not adequately tested, rooting may also cause
compatibility issues and render your system vulnerable to viruses.
Due to its unpredictable negative effects, it is recommended that you exercise caution when
rooting your phone. Huawei does not provide technical support for any device issues caused by
rooting.
If you have rooted your phone, it is recommended that you go to Settings > System update and
update your phone to the latest version.
My phone or charger buzzes while charging
Cause:
Some components inside the charger may vibrate while being charged, which can produce a faint
buzzing sound. Oscillation by your phone"s capacitor may also produce such sounds.
1. The human ear has an audible frequency range which is roughly 20 Hz to 20 kHz.
2. When your phone is fully or nearly fully charged, but still connected to the charger, you
may notice a faint buzzing sound as the working frequency of the charger reaches 20
kHz.
3. Most of the time, the charger works at a frequency much higher than 20 kHz.
4. The oscillation frequency of your phone"s capacitor varies by the power supply and can
sometimes be heard.
Solution:

Huawei chargers have passed strict security certification and tests. The faint buzzing
sounds are normal and do not indicate an issue with your phone.

When your phone is fully charged, unplug the charger. If the charger malfunctions, take
your phone, charger, data cable, and proof of purchase to an authorised Huawei Customer
Service Centre for assistance.