4.35 Why can't I make phone calls when my phone receives 4G signals? ....................................................................... 78
4.36 How do I switch between calls or merge two calls to have a conference call? ......................................................... 78
4.37 What does a card display when a call is coming through the card during a call through another card? ................... 80
4.38 How do I view the call log? ...................................................................................................................................... 80
4.39 Why can't I find in Contacts the contact I have created from the dialer screen?....................................................... 81
4.40 When my dual-card phone displays emergency calls, why can I make calls? .......................................................... 81
4.41 Why is the incoming number displayed as unknown? .............................................................................................. 81
4.42 Why is the screen still off after I move my phone away from my ear?..................................................................... 82
4.43 How do I delete the call log? .................................................................................................................................... 82
4.44 Why does the call ringtone automatically revert to the default ringtone? ................................................................. 82
4.45 How can I delete the pre-installed ringtone? ............................................................................................................ 83
4.46 How do I export contacts to another phone using a SIM card? ................................................................................ 83
4.47 How do I export contacts to another phone using a storage device? ........................................................................ 83
4.48 How do I assign a unique ringtone for a contact or contact group? .......................................................................... 83
4.49 How do I assign a photo to a contact? ...................................................................................................................... 83
4.50 How do I display the contacts in the SIM card? ....................................................................................................... 84
4.51 Does my phone support video calls? ........................................................................................................................ 84
4.52 How can I cancel the keyboard touch sound? ........................................................................................................... 84
4.53 How can I query the missed calls? ............................................................................................................................ 84
4.54 How can I add multiple numbers to a contact? ......................................................................................................... 84
4.55 How can I set the contact storage location? .............................................................................................................. 84
4.56 How can I quickly find a contact? ............................................................................................................................ 85
4.57 How can I set the blacklist of the incoming calls? .................................................................................................... 85
4.58 Why can't I hear the voice of another party during a call? ........................................................................................ 85
4.59 How do I return to the call screen? ........................................................................................................................... 85
4.60 How do I activate the call waiting function? ............................................................................................................ 85
4.61 How do I forward all incoming calls to another number?......................................................................................... 85
4.62 How can I forward the unanswered calls to another number? .................................................................................. 86
4.63 How can I forward the unreachable calls to another number? .................................................................................. 86
4.64 How do I edit the text message for rejected incoming calls? .................................................................................... 86
4.65 How do I delete a favorite contact? .......................................................................................................................... 86
4.66 How do I remove a contact from the blacklist? ........................................................................................................ 86
4.67 How do I delete intercepted call and SMS logs? ...................................................................................................... 86
4.68 How do I quickly mute the incoming call? ............................................................................................................... 87
4.69 How do I quickly dial a number? .............................................................................................................................. 87
4.70 How can I set the contact blacklist? .......................................................................................................................... 87
4.71 How do I merge contacts?......................................................................................................................................... 87
4.72 Why does my phone fail to save a new contact? ...................................................................................................... 87
4.73 Why do contacts from IM apps such as WeChat appear as separate contacts? ......................................................... 87
4.74 Why can't I select the SIM card for making calls?.................................................................................................... 87
4.75 Why can't I receive calls even when the signal strength is strong? ........................................................................... 88
4.76 What is the purpose of the Fixed Dialing Number (FDN) feature? .......................................................................... 88
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