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− When you are on a call with the other party whose voice may be too large and your
ear is sensitive to that volume, you may hear noise.
− If you are uncomfortable with the large volume, set the volume to a lower level.
− If you find the receiver volume too small after you set the volume to a lower level,
align the receiver with your ear.
− If you are in a noisy environment where you need to increase the volume, use a
headset or Bluetooth headset for phone calls.
4.10 Why does my phone enter airplane mode when a call
disconnects?
The airplane mode is mainly triggered in the following modes:
1. Triggered using the shortcut switch in the swipe-down signal bar
2. Triggered using the menu called by pressing and holding the power button
If you make phone calls without placing your phone near your ear, the airplane mode may be
incorrectly triggered in the signal bar before the proximity sensor makes the screen turned off.
You can move the airplane mode switch to the last on the list. To do so, touch the last icon on
the switch screen to access the user-defined shortcut switch screen.
4.11 Why can't I receive incoming calls or why does the
calling party hear that the called party is in a call or is
busy?
The network may not be functioning properly. If this often happens, contact your carrier.
4.12 Why can't I receive calls when 4G is enabled? Is just
turning off 4G enough?
First make sure that the 4G switch is on.
Since the 4G network is still being perfected, support for voice calls is not perfect. (Normally
the inability to receive calls on 4G networks is caused by coordination problems between
3G/2G and 4G core networks.) So, it may happen that you can't receive calls in some areas
when you have the 4G switch turned on. If this happens a lot, please contact the operator of
that network to resolve the problem.
Temporary solution: When you don't need to use 4G service, try to keep the 4G switch turned
off.
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