VoLTE is an end-to-end voice solution built on a 4G network under all IP conditions. In order to ensure service quality, operators will intelligently select 2G or 3G network calls in the case of 4G networks. In addition, special service numbers (alarm calls, etc.) are required by operators. Make calls on 2G or 3G networks. VoLTE calling function requires the support of mobile phone hardware and carrier network.
solution:
1. At present, the VoLTE call function is still in progress, and the mobile phone may sometimes fail to make VoLTE calls or abnormal calls. Before use, please consult the operator whether it supports and activates this function.
2. Please note that if you are using the telecom volte function, please be sure to register and enable this function with the operator first, otherwise there will be problems with the call.
Possible causes and solutions:
1. Problems on the network side: Please check whether the network signal is poor, please change the environment with better strength, restart the phone and try again.
In addition, please do not turn on the telecom volte switch without applying to the telecom operator to activate the volte, otherwise there will be exceptions such as the call being unable to be connected.
2. The function of rejecting calls or anti-harassment is set on the mobile phone side: please open the system settings - harassment blocking, and confirm whether you have enabled this function and whether the incoming phone number is within the blocking range. If yes, please cancel and try again.
Please check whether your mobile phone can make a call, if it can make a call, but only all applications cannot access the data network.
1. Please confirm whether the data switch is turned on, and go to the settings to check whether the data switch of the card is turned on; or pull down the notification bar to check whether the data connection switch is turned on.
2. You can log in to the operator's online business hall or telephone hotline on a computer or other mobile phone to check whether the mobile phone card has activated the mobile Internet access function, and whether it has been suspended due to arrears.
3. Please go to System Settings > Traffic Management > Network Control to check whether the traffic usage has exceeded the package you set, or whether your Internet permission (data network) is enabled, please enable the Internet permission or calibrate your package settings after confirming the purchase of traffic continue to surf the Internet.
4. Check whether the data network access point is configured correctly and reset the access point default settings. Enter the phone settings - network and Internet - dual card settings - mobile network - access point name (APN), check whether it is normal, or directly restore the default settings.
If there is still a problem, it is recommended to back up your mobile phone data, reset the network settings (supported by some models) or back up your mobile phone data, and directly restore the factory settings to check whether it returns to normal.
It is recommended that you upgrade the system settings to the latest version, add harassing calls to the blacklist in the harassment blocking function, and enable the block blacklist option in the call blocking rules.
Please confirm whether there is no 4G logo in all places or only in some specific places, what logo is displayed, whether it is 3G or 2G, if it keeps jumping between 3G and 2G, it is because the network signal in the current environment is poor. caused.
If the mobile phone has been changed to multiple locations, and the 4G signal cannot appear, please restart the mobile phone first.
If it still cannot be recovered, please confirm whether the card is cut. If the card is cut, please use a regular SIM card (non-cut card) to see if the phone can use 4G normally.
1. If you are on a call with the screen locked, the finger that has not entered the fingerprint touches the fingerprint sensing area and vibrates. This is a normal phenomenon. You can make a call in the unlocked state, or avoid touching the fingerprint during the call. sensing area.
2. Please make sure you touch the app when the screen is unlocked and the screen is on. It is normal to vibrate when you touch the app button. It is recommended that you keep a certain distance from the phone screen during a call to prevent accidental touches.
The accidental vibration of the mobile phone is generally caused by unintentionally touching some buttons or message prompts, please feel free to use it. If there is obviously abnormal vibration (such as the vibration feeling is obviously stronger than the usual prompt vibration or frequent large-scale vibration for no reason), please back up the data and bring the purchase invoice to the after-sales service outlet for maintenance.
1. Please note that the two parties on the call should not be in the same room or too close. It is recommended to be at least 10 meters away. When the two mobile phones are close to each other, the sound from your mobile phone is easily received by the microphone of the other mobile phone, and then played from your mobile phone, causing echo or noise.
2. If you hear your own echo during the call, it is usually a problem with the other party's mobile phone.
3. If you find that there is an echo when talking to someone, you can try to make a call on another person's mobile phone, or make a call on a landline to confirm whether there is an echo.
4. If the other party hears your own echo during the call, please bring the purchase invoice to the after-sales service point for maintenance
1. If you occasionally have a silent call and the other party can't hear you no matter where you are: it may be that when you are holding a phone call, your finger is placed on the bottom of the phone, blocking the main microphone (MIC), and a call will appear at this time. If the other party feels that the voice is low or silent, intermittent, or there is noise, it is recommended that you pay attention to the holding posture during the call and try to avoid blocking the microphone.
The main microphone (MIC) of the mobile phone is located in a small hole on the side next to the USB socket at the bottom of the mobile phone. If there are holes on both sides of the bottom of the phone, you can judge which side is the speaker and the other side is the phone's microphone by playing music and blocking one side of the holes with your fingers.
2. If you only have the problem of silent, low, intermittent, and noisy calls in a fixed location, it will be better if you change the location: Please check the operator's signal status at the location through the signal status bar of your mobile phone. This can be caused by a weak carrier network signal.
If the recording effect and playback effect of other applications are normal, it may be caused by a problem with the network or the other party's mobile phone.
If the recordings of other applications are also abnormal, please back up important data in advance, and bring the purchase invoice to the customer service center for testing and processing.
1. Please make a call in an environment with good signal.
2. When talking in handheld mode, please adjust the grip appropriately to see if there is any improvement.
3. Aim your ear to the position of the receiver during a call, which can effectively increase the volume of the call.
4. During the call, press the volume up and down keys to adjust the call volume.
5. Please try to make calls in an environment with little noise interference.
1. Check the network environment first, the network environment suddenly deteriorates, the signal strength suddenly weakens or the interference suddenly increases.
2. The network environment where the mobile phone is located is overloaded, please try to change the network environment.
3. The microphone is blocked by your fingers, please remove the phone from the microphone.
4. The volume down button was accidentally pressed during a call.
5. For other network problems, please try another place.
1. The network environment suddenly deteriorates, and the signal strength suddenly weakens. Please move the mobile phone to a place with strong signal to try
2. The network environment where the mobile phone is located is overloaded, please try after changing the network environment.
3. It is possible that the phone microphone is blocked by your fingers, please adjust the gesture of holding the phone
4. The volume down button was accidentally pressed during a call. Please back up the data and send it to the local after-sales network for testing.
1. Play music on the mobile phone and check whether the sound is abnormal. If so, it means that there is a problem with the audio of the mobile phone;
2. If there is a problem, if you wear a headset (by its Bluetooth headset), you can unplug the headset to see if there is still a problem;
3. Turn on the speakerphone when the problem occurs, and check whether the sound returns to normal. If it returns to normal, it means that there is a problem with the audio;
4. Check the signal strength when the problem occurs. If the signal is relatively poor, it means that the network coverage is a problem. It is recommended to move the location to a place with a good signal to see if there is a significant improvement.
1. If it is an intermittent and probabilistic current sound problem, it may be a network problem:
Please check whether the mobile phone signal is full. If the call is interrupted intermittently in a place with weak signal or in an area with strong interference, it may be caused by a network problem, which is a normal phenomenon, please try to use it in an environment with better signal.
Please turn off the 4G switch in the settings before trying to call. If there is any improvement, it means that the current 4G network may be a newly deployed network and there is instability.
Please use a standard wired headset or turn on the speaker to talk and see if there is improvement. If there is improvement, there may be a problem with the microphone, please go to the nearby after-sales outlet for inspection.
Whether the hand position is blocking the microphone port, if the other party can't hear it, please try to get close to the microphone.
2. If the earpiece makes a "zzz" sound when the volume is high, and it has nothing to do with the network environment, the reasons may be as follows:
Too loud volume will make people feel uncomfortable, please lower the volume appropriately. Some people's voices are relatively full, and the human ear is particularly sensitive to this part of the frequency, so when talking with certain people, you may hear a slight "zzz" sound, which is more obvious for users with more sensitive ears.
For users who need to use their mobile phones in high volume scenarios (such as noisy environments) for a long time, it is recommended that you use auxiliary devices such as headphones and Bluetooth headphones to make calls.
It is recommended to enter "*#*#8613#*#*" in the dialing interface to test the single item to test whether the function of the speaker, handset, microphone and earphone is normal.
If the problem still exists after the above operations, please bring the purchase invoice to the after-sales service point for overhaul.
Possible causes and solutions:
If it happens by chance:
1. Local network problems:
Please check whether there is a problem only in a certain area, and whether other people around have the same problem. If so, it is likely that there is a problem with the network itself in the area; check that the signal of the mobile phone is weak, such as the signal bar is only 1 bar or the fluctuation is large.
Temporary solution Please try to set the network to 3G or 2G, the network may be improved under different standards. At the same time, please complain to the local operator for handling, request to check the network configuration, and improve the signal strength of the network coverage.
2. Poor contact of SIM card: Please check whether your SIM card is a standard small card. If the large card is cut, it is likely to cause poor contact of the card slot, and various communication problems such as no network and weak signal. It is strongly recommended to replace the original one. standard card.
Please check whether a metal protective cover is used. The metal may shield the signal, resulting in poor mobile phone signal and further disconnection. Please try to remove the protective cover to test the effect.
Please try to upgrade to the latest system software, you can choose the official website SD card package upgrade or FOTA upgrade, please search how to upgrade the problem entry.
If it is inevitable: If your mobile phone has a call drop or interruption problem anywhere, it may be that the mobile phone hardware is faulty. It is recommended that you go to an outlet for testing.
It is normal to hear a slight rustling sound during a call. The mobile phone retains some background noise to ensure that the quality of the call is as little as possible affected by noise removal. This design is not a mobile phone fault, please use it with confidence.
Scenario 1: Poor hands-free calling
Problem phenomenon:
The mobile phone speaker is a high-power device. When the volume is reduced to the minimum volume, the amplifier is still working, and it will still output a certain noise floor. Therefore, when the ear is close to the speaker, you will hear this noise, that is, "current sound". It is not a device problem. Please You can use it with confidence. At the same time, please do not put your ear close to the speaker when using the speaker to avoid hearing damage.
Problem cause and solution:
In areas with weak signal/strong interference, it is normal for the call to be interrupted intermittently. Use in an environment with a normal network signal can improve such problems.
Impurities entering the speakers can also cause noise. Please clean the speaker dust and see if there is any improvement.
Damaged speakers can also cause poor calls. Please try using the headset for a call to see if the effect improves. If there is improvement, the speaker may be damaged. Please bring the purchase invoice to the nearest outlet for inspection and maintenance.
Scenario 2: The headset call effect is poor
solution:
It is normal for calls to be interrupted intermittently in areas with weak signal/strong interference. It is recommended that you use it in an environment with a good network signal.
Please use the wired headset that comes standard with the purchase or turn on the speaker to talk to verify whether there is any improvement.
When there is discomfort in hearing, please lower the volume appropriately.
Damaged headphones can also lead to poor call quality. It is recommended to replace the matching earphones in time to avoid hearing damage.
Scenario 3: The handset call effect is poor
solution:
It is normal for calls to be interrupted intermittently in areas with weak signal/strong interference. Such problems can be improved by using in an environment with normal network signal.
Please use the wired headset that comes standard with the purchase or turn on the speaker to talk to verify whether there is any improvement.
When there is discomfort in hearing, please lower the volume appropriately.
Possible causes and solutions:
You hear your own echo during the call: Maybe the other party's phone has a problem or the network is unstable. It is recommended that you try to check whether other callers and the call environment have the same problem.
During the call, the other party reported hearing your echo: It is recommended that you check that your fingers do not block the MIC hole during the call; try to change other call objects or call environments.
If you hear echoes in different callers, it is recommended that you back up the data and take the purchase certificate to the after-sales outlet for maintenance.
1. When playing games and watching videos in full screen, only the incoming call interface will be displayed at the top of the screen. You can directly click the answer or hang up button.
2. The interface disappears due to misoperation, please exit the current application, and then pull down the status bar to perform related operations in the status bar.
3. Due to the influence of the network signal, the phone does not enter the call state immediately after answering the call, please be patient for a while.