Why Can't I Make A Call Or Why Do Calls Disconnect Even Though I Have Good Signal Reception - Huawei P8 Faq

5.5 Why can't I make a call or why do calls disconnect even
though I have good signal reception?
A number of factors affect phone calls. These include both the strength and the quality of the
signal (such as signal interference). It could also be due to limited network resources. Usually,
if you cannot make a call or your call disconnects, it is probably due to limited network
resources.
5.6 What do I if a dialogue box appears saying, Voicemail
number missing when I make calls?
Do the following to solve this problem: in Settings > Voicemail number, enter your
voicemail number. When you activate voicemail service at a service center, the customer
service representative will give you your number. If you forget it, you can call your mobile
phone service carrier's customer service number (For example: China Mobile: 10086) and ask
for your voicemail number.
5.7 What do I do if I can't remove the New voicemail
message from the drop-down notification panel?
Remove it in this way: Touch and hold the New voicemail notification message and swipe
right or left at the same time. In the Delete the current notification dialog box that appears,
touch OK to confirm. The notification says that Manually deleting this notification may
cause errors in this application. Are you sure you want to continue? However, deleting the
notification message will not affect the phone. After this you will not be notified about
voicemail messages unless you have a new voicemail.
5.8 What do I do if I frequently miss phone calls?
1. Check if Do not disturb mode is turned on in Settings > All Settings > Privacy and
Security. If so, try turning this mode off.
2. Turn of the volume on your phone to its loudest setting.
3. Check whether the phone's status has been set to mute for a long time. Also, check whether
being in a noisy environment is causing you to miss phone calls.
4. Restore to factory settings.
5. Update to the newest software version.