Common Problems in Samsung Galaxy A21s and Solutions – Wi-Fi, Bluetooth, Camera, SIM, and More

Samsung A21S SM-A217F, A217M FRP Bypass | Use EFT, CM2, UMT

• Check and make sure a compatibility issue between the Bluetooth versions on both the devices you are trying to connect might be causing this problem
• The reason to this problem is a software glitch with the default Bluetooth drivers on your Samsung Galaxy A21s
• Do check and make sure the phone Bluetooth visibility is not hidden and the problem is caused because of the very same reason
• This problem could be there just because you are sending a lot of data in one cycle. Divide it into smaller sections for smooth Bluetooth functionality
• Make sure the problem is not there just because the phone is active in the power saving mode which in some cases disable the phone Bluetooth
• The other device you are trying to connect to might be suffering from a problem. Check the same
• The pairing of both the Bluetooth devices might not be proper. Disconnect them and try connecting them again
• A wide Bluetooth history list can be the reason you have to face this problem. Erase a few or all the names from the same and check if this works
• Delete the phone cache data and check if this helps you to fix the problem
• There are chances that any of the devices you are going to connect to each other is infected with a virus or there is a similar security issue
• The phone Bluetooth antenna might be unable to perform its task just because of a fault or if the devices are not placed within the defined Bluetooth area i.e. approx 3 square meter
• A simple restart can fix this problem. Try it
• Make sure the problem is not there just because the phone is having a hardware problem

• The network you are trying to connect your device to might be having a lot of congestion due to a number of devices connected to the same. Check if this is the reason to the problem
• Don’t make any changes to the Local Area Network settings on your device. This can cause the actual trouble
• Make sure this problem is not there just because the network security is turned OFF
• There is a probability of having a problem either with the signal antenna on the phone or on the router you are using
• The device might not be getting proper Wi-Fi signal strength because of placing the router at an odd location in your arena. Check
• Your internet connection probably has a bandwidth limit on the same and it might have reached. Check if this stops the services
• Sometimes the users have to face this problem just because the app/browser or domain they open is having something wrong with the same
• The router might not be able to allow more connections just because its limit is reached. Check
• The reason to this problem is nothing but a basic glitch associated with the default Wi-Fi drivers
• Check if the network password you entered in your Samsung Galaxy A21s is incorrect/outdated
• This problem is often experienced when you are already downloading a lot of data on your device. Stop the same ad check if this works
• Make sure the router is not having any configuration error related to the same which is causing this problem
• The problem might be there just because your phone is having an OS or a hardware problem. Check the same

• Your data pack might have expired. Check the same and make sure it is not the reason to this problem
• This might be happening due to crossing your daily bandwidth limit usage. Check if this is the case
• Make sure the actual problem is not with the phone SIM card. Refer to the solutions listed under the headline “SIM/Network Problems” in this post
• Make sure if the internet services are facing an obstacle on your phone due to any of the possible reason
• This can happen in some cases when the phone is updating the installed apps or is downloading the OS updates. Check if this is the reason
• Simply make sure the actual fault is not caused just because the storage space is not available in the phone. This can happen in certain cases
• A problem with the service provider or with the network can be a reason you have to face this fault in your phone
• Make sure you are not confusing this problem with the slow internet speed
• Check if the problem is caused by a poor signal strength on your Samsung Galaxy A21s
• Reset the network setting to the recommended mode in case you customize them. This can solve the problem for sure
• Simply restart the phone and check if this help you to fix the issue
• Turning the roaming services OFF can be a reason to this problem on your device
• Check if the network mode selection on the phone is wrong. You might have selected a 2G network in the same when you are using a 4G SIM
• Clear the cache partition of the device and check if this solves the problem on your device

• Check if the internet connectivity on the device is poor and the same is causing this problem
• Make sure the actual problem is not in the phone GPS sensor. Check and get it repaired if you find the same
• The problem could be there in the GPS antenna of the device. Thus, check the same and take the action required
• Toggle the phone GPS and check if this works
• Sometimes running a number of apps in the phone that access the phone GPS cause this problem. Close a few and check if the problem is solved
• Check if the phone location services are ON. This is required for the proper working and functionality of phone GPS
• Enabling power saving mode on your Samsung Galaxy A21s can be the reason to this problem
• Make sure the GPS problem in the device is not related to the failure of any hardware component
• Check if any important OS update is spending and install the same. This can solve the GPS-related common problems in Samsung Galaxy A21s
• Select high accuracy mode in the location services and restart your device. This may solve the problem
• Check if this problem can be solved by updating the Google maps
• Recalibrate the GPS on the device using the compass app and check if the problem is eliminated
• The phone GPS might be disabled or turned OFF manually. Check and turn it ON if so
• Refreshing the GPS data on your device can solve this problem. Check if this works
• If nothing work, perform a factory restart by saving the phone data first and check if the problem is gone

• Just turn OFF the phone and again turn it ON. Check if the performance is restored
• Simply clear the cache data of your phone which you haven’t cleared for a long time. Doing this can help a lot
• Make sure the installed applications and the phone Operating System are fully updated to the latest available versions
• In case you have changed the recommended settings of your device or for the apps, the same can affect the overall performance
• One of the reasons to the performance-related common Samsung Galaxy A21s problems is a faulty RAM in the device
• Make sure the memory of your device is not completely filled. At least 2GB free space is to be there for smoother operations
• The performance of any smartphone can get affected when you run it in the safe mode all the time. Check if this is the reason in your case as well
• There are chances that the actual problem is with the phone RAM. Check the same
• Make sure you are not running multiple features of your device all at the same time
• A lot of users often confuse the slow operating internet on their phone to the slow performance of their device
• Perform a hardware reset and this will probably fix the problem. Save your device data before you proceed

• Your device might be having a problem with the battery inside. First, check the same
• Try a basic reboot and check if this helps you to deal with the problem
• One of the reasons to this problem is nothing but the installation of so many games in the device
• Do check and make it sure that all the apps installed in the device are fully updated
• Sometimes this problem is caused by bad apps and unused data in the phone. Check and erase the same
• Simply make sure that the device ventilation system is in proper working condition and is not responsible for this fault
• Many users face this problem in their Samsung Galaxy A21s just because of using a third-party or a low-quality accessory with the device
• Check if this problem is caused by a phone virus which might be there in the default storage space
• Check in case the power bank you are using is responsible for this problem because it is having different specifications that what on the phone
• The reason to this problem could be a high power charger which you might be using
• There are chances that the problem is caused just because the phone is having something wrong with the processor inside. Check the same
• Wipe the cache partition and check if this helps you to fix the problem

• First, check if this problem is caused by a weak charging source or the one which is causing power fluctuation
• Simply make sure the problem is not caused just because you are using a charger which is having its adapter or the cable not in proper working condition
• The reason to this problem is nothing but allowing the phone data to get synchronized with the apps all the time
• Make sure you are not playing games or downloading the data from the internet while charging your device
• Keep the mobile data and the Wi-Fi OFF while charging your smartphone
• Make sure the charging port of your Samsung Galaxy A21s is not having anything wrong with the same which is causing this problem
• Clear the cache data and perform a basic reboot. Check if this helps to fix the problem
• Perform a software reset and the problem will probably be gone
• One of the leading reasons to this problem is nothing but a fault with the phone battery. Check the same
• In certain cases, this problem is caused by a phone virus. Check and remove the same from the phone memory
• The reason you are facing this problem is nothing but there are apps not in proper working condition in your device

• The pre-installed glass guard on the device screen should be removed first. Check if this solves the problem
• Do check and make sure the problem is not caused by burst mode which you have selected while capturing the images
• One of the reasons to the camera-related common Samsung Galaxy A21s problems is nothing but not using image stabilization option
• Select the best image resolution in the camera settings. This will probably fix the problem
• Sometimes this problem is caused during a video call only and for this, you simply need to check if the signal strength is too low
• Avoid using the camera zoom feature as this often degrades the overall quality
• The reason to this problem could be a fault with the app you are using. It is always recommended to go ahead with the default camera app only than using any other
• Check if there is no storage space available in the phone and the captured images are therefore getting stored in a low-quality format
• Do check and make sure the problem is not there just because the camera lens is having moisture or dust in the same
• This problem could be there just because the shooting mode selected by you is not as per the nearby visibility conditions. Check
• Check and make sure the problem is not there in the phone OS which is not allowing you to open and run the phone camera

• The reason to this problem is continuous data downloading in your phone. Check if the installed and the system apps are allowed to install automatic updates
• Make sure this problem is not caused by a phone virus which usually finds its entry in the device
• In some cases, it’s nothing but that extra level of screen brightness that causes this problem
• One of the leading reasons to this problem is nothing but the installation of power-hungry apps in your phone. Check and remove them
• Make sure the fault is not caused because the phone is running in the safe mode for a long time
• Check if this problem is there just because a lot of notifications are lying unread in the background
• Do check and make sure this problem is not caused just because your Samsung Galaxy A21s is having something wrong with the battery inside
• Sometimes this nothing but an OS bug in the device which causes this problem
• Check if the internet connection of your phone is shared with other devices through Wi-Fi hotspot. This also drains the battery too quickly
• Close the apps running in the background and check if this helps you to deal with the problem

• Do check and make sure the problem is not caused just because your phone’s earpiece connector is faulty. Check it properly
• The reason to this problem is nothing but running your Samsung Galaxy A21s in customized sound settings. Check and restore
• Simply make sure the problem is not there just because you haven’t connected the earpiece properly with the phone
• A sharp bend on the earpiece wire can cause signal blockage and can, therefore, be a reason to the robotic sound
• In case you are using a Bluetooth-enabled earpiece, simply make sure to stay within the defined Bluetooth signal range (area)
• A low-quality earpiece can directly be blamed for this problem. Check the same
• The reason to this problem is nothing but a fault in the earpiece itself. Check if it works properly when connected to another device
• Sometimes the users have to face this problem because of no other reason than selecting a wrong sound type option for the earpiece
• Check if the phone sounds are manually turned OFF
• This problem if experienced during a phone call can be due to low or improper signal strength
• Signal attenuation might be caused just because of the intermixing of frequencies. Check the same

• Simply make sure the problem is not there just because your phone is having something wrong with the device screen sensors
• Remove the glass guard installed from the screen to check if the problem is caused by the same
• Lack of cleanliness on the screen against the oil, sweat and grease particles is one of the reasons to the screen-related common Samsung Galaxy A21s problems
• You can face this problem because of not updating your device for a long time
• Try performing a forced restart to check if this fixes the problem
• Simply remove the micro SD card if the same has been inserted in the device. Check if this works
• Don’t run the device in the power saving mode as you can experience this problem because of the very same reason
• Sometimes this problem is experienced only when you turn ON the screen sharing option and share the device screen with a third-party gadget
• The reason to this problem could be a fault in any of the hardware components inside your phone
• Check if the default screen drivers in the phone are not working properly
• This problem could be there due to a physical damage on the screen

• Begin with a simple reboot to check if this helps you to fix the problem
• Do check and make sure the problem is not caused just because your device is having something wrong with the RAM
• Sometimes this problem is caused just because of bad or blocked apps in the device. Check and remove them all
• Denying permission to the apps for accessing the data can be a reason to this problem
• Update all the apps which are pending and this will probably fix the problem
• Many users have to face this problem just because of installing the apps from another source than Play Store
• Don’t run your Samsung Galaxy A21s in the safe mode or in the power saving mode as this can have a large impact on the working and performance of the installed apps
• The reason to this problem is nothing but operating the apps in the custom settings
• Many users complain about having app-related problems in the phone when they disable some features of the phone manually
• Move the apps to the system storage space than keeping them in a third-party storage space such as a micro SD card
• Uninstall the apps which are not working properly and install it once again from the Play Store. Check if this helps
• Check if a basic restart helps you to fix this problem

• Open the network settings and switch the network selection key to the automatic option
• This problem might be there because the Airplane mode is turned ON. Check the same
• While traveling make sure to turn ON the roaming services
• This problem is often experienced in some cases after unlocking the phone bootloader
• The reason to this problem is nothing but a damaged SIM card. Check the same
• You might have mistakenly turned OFF the SIM card
• The SIM card might have not been inserted properly in the phone and the same is causing the problem. Check
• The SIM card access might be locked by a PIN or a password. Check and remove the same
• Check if the SIM tray is having a physical damage on the same
• The signal antenna on your Samsung Galaxy A21s might not be performing its task. Check the same
• The reason to this problem is nothing but a problem in the SIM card slot in the phone
• Make sure the problem is not caused just because the services are no longer valid on your SIM card just because you haven’t used the same for a long time

• First of all, simply clean your hands. Dust or debris on the fingers can be a reason to the problem. Check and take action required
• Gently clean the fingerprint scanner on the phone with a soft cloth and check if this solves the problem
• This problem can sometimes declare its presence due to completely filling the storage space of the phone
• The fingerprint scanner might not be working due to a bug in the Operating System. Check and take the required action.
• Simply delete the saved fingerprint from your Samsung Galaxy A21s and add it again. This can solve the problem
• One of the reasons to the fingerprint-related common problems in Samsung Galaxy A21s is nothing but putting pressure on the fingerprint scanner very softly. Put a bit more pressure on the same with your finger and check if this works
• Always make sure to add more than one fingerprint
• Your fingers might be wet and the same can be a reason to this problem
• Always give priority to the phone updates. Installing them make sure the problem wouldn’t declare its presence
• Check if there is a minor injury on your finger which might be acting as a barrier for the scanner when it try to read the information from the same
• Performing a factory restart can solve this problem. If this doesn’t work, the reason to this problem might be a hardware fault in the phone.
• Sometimes this problem could be there due to allowing multiple apps installed in the phone to access the fingerprint scanner on the phone. Check and take the action required

• Check if the phone battery is charged. This could be due to the consumption of entire juice from the same
• An issue with the third-party app can cause this problem. Thus, check all the apps before you install them in the phone and make sure they are compatible with the same
• Make sure to press the power button a bit harder and check if this helps
• Sometimes this problem would be due to a fault in the power button. Check and take the action required
• An unknown software glitch in the device can be a reason to this problem. Check and take the action required
• There are chances that the phone is getting turned but it’s the screen which is not. Check and make sure this is not the actual issue in your case
• This might be happening because you restarted or turned OFF your device when it was updating
• Know the exact number of seconds for which you need to press the power button. Sometimes this problem is there just because you are pressing the same for a very short span of time
• Liquid damage to your Samsung Galaxy A21s can be a reason to this problem. Check and take the action required
• Hardware damage in your phone can be the reason to this problem. Check and get it repaired
• Overheating can sometimes turn off the device automatically and you cannot turn it ON unless the inner temperature comes down the normal range
• Check if the phone can be turned ON in the safe mode. Press the power button with the volume up/down button for the same. If this doesn’t work, try opening it in the recovery mode

• Check if this is a problem just because the phone battery is faulty
• Make sure the phone charger is in proper working condition
• A loose connection between the phone and the charging cable can be a reason to this problem. Thus, make sure to connect them properly
• A bad app or the one installed from a third-party source can be the reason to this problem
• Don’t use a third-party charger as this can be a reason to this problem
• Check if dust or debris is there in the charging port and clean it. The same can be a reason you have to face this problem in your device
• In some cases, the phone gets charged but the charging percentage icon which doesn’t give the correct information. This can happen due to a software bug. Check and install the latest updates if the same is pending
• Sometimes the charging-related common problems in Samsung Galaxy A21s are experienced when the charging socket/power source you are using to charge your widget is faulty
• Check if the actual fault is with the charging cable. Check and replace the same if required
• This problem could be due to the detection of moisture in your Samsung Galaxy A21s. Check its level and take the required action
• Remove the last application you installed and check if this helps you to deal with the problem
• An issue with the phone motherboard can be the reason you have to face this problem
• The pins in the phone socket might be damaged and the same is causing this problem. Check the same
• Drain the phone battery completely and charge it again. Check if the problems is solved
• Performing a forced restart to the phone can fix this issue. Simply try the same

• Check the default camera driver software in the phone. Check if installing the new updates for the OS fixes this problem
• Make sure you aren’t using a third-party camera application which is not compatible with your Samsung Galaxy A21s
• Disable the safe mode if your phone is running in the same
• This problem could be there just because the phone has something wrong with any of the hardware components inside
• Close the camera application if it is running in the background and open it again after 30 seconds. Check if this solves the problem
• Delete the cache of the camera application and check if this helps you to deal with the problem
• Do check and make sure the actual problem is not caused just because the camera lens is faulty or damage
• There might be no storage space available in the phone or in the memory selected for storing the camera files and the same can cause this problem. Most of the times the camera-related common problems in Samsung Galaxy A21s are because of no other reason than this