Call And Contacts; Why The 4G Signal Is Displayed On Screen But Can Not Make Calls; Screen Still Keep Black When The Phone Leave Ear In Calls; In Calls, Sounds Are Very Small Or Noisy - Huawei GR3 Faq Manual

9 Call and Contacts

9.1

Why the 4G signal is displayed on screen but can not make calls?

If the problem happens when 4G is opened, you may turn 4G off.
Reason : Although there is 4G signal, but voice calls is depend on 2G network(CSFB), it
need 2G \4G network coordinate. May be somewhere ,4G network is constructing,
network configuration may imperfect, you can not received calls when 4G is on. So, if it
happening frequently, you can turn 4G off, and you can also contact the appropriate
operators to handle it , too.
9.2

Screen still keep black when the phone leave ear in calls

The proximity sensor is on the top of screen, near the receiver.
In calls, when the mobile phone close to the ear or other object covers top of the
screen, the phone will automatically turn off the screen to prevent misoperations. After
left ear or the object removed, the screen will automatically light up to facilitate your
operation.
If in the calling process, mobile phone is still keep black after left ear, press the power
button to light the screen and check the if the proximity sensor is covered?
Note: In order to ensure the phone can be normal used, do not using a mobile phone
cover or other object to cover the proximity sensor and the nearby. Proposed to buy
customized screen protective film for this mobile phone.
9.3

In calls, sounds are very small or noisy

In calls, press the Volume-up keys to increase call volume.
Please make calls under the better network signal and small noise environment.
Receiver aligned to you ear, can effectively improve the call volume.
Do not use your fingers or other objects blocking the microphone (usually at the
bottom of the phone), sound source should not far from the microphone.
74