Nowadays there are certain dedicated applications for checking the data balance and call balance of your mobile number which need an internet connection to operate. So sometimes it won’t be possible and users have to dial the USSD code to access particular information.
Recently, many iPhone users have experienced an error while trying to access the information regarding calls or data balance for their network. Whenever they tried to access it, it threw an error message that says as follows.
Error performing request
Unknown Error
After researching for a while, we found out that this error could possibly have occurred because of the network issues within their area. Also, whenever any user enters the incorrect USSD code and dials it, it will cause such an error.
In this article, you will find different best possible solutions that will assist the user in resolving this error message on their iPhone.
Fix 1 – Check the USSD Code
The main reason behind this error message is the wrong USSD code was entered while dialing on the iPhone to access the additional information regarding the cellular call or data balance.
So before trying to dial, first check and verify the USSD code on the internet and then try to dial.
This can possibly resolve this issue.
NOTE – Also, a weak signal at a particular location can also possibly cause such an error on any mobile device. So try to move to a different location and check if the problem is resolved.
Fix 2 – Change the Voice & Data Setting
If Voice & Data setting is not set appropriately, it causes such problems as discussed above in this article. Also, not setting the Network Selection option to Automatically can lead to such a problem on any iPhone.
Follow the steps below on how to do it.
Step 1: First, open the Settings page on your iPhone.
Step 2: Then tap on the Mobile Data option as shown below.
Step 3: Choose Mobile Data Options by tapping on it as shown in the below image.
Step 4: Next, select the Voice & Data option.
Step 5: Once the Voice & Data page opens, tap on 4G from the list and make sure the VoLTE toggle switch is turned on.
Step 6: Now go back to the Mobile Data page.
Step 7: Tap on the Network Selection option.
Step 8: After it opens, tap on the Automatic toggle button to turn it on as shown in the below screenshot.
Fix 3 – Turn On the Airplane Mode and Turn it Off
Many iPhone users have claimed that they fixed this error message by enabling airplane mode and then disabling it. It refreshes the network connectivity glitch if any on the mobile device.
Follow the steps below on how to do it.
Step 1: Open the Control Centre by swiping down the screen from the top right side of the iPhone screen after unlocking it.
Step 2: Then tap on the Airplane mode in the top left corner to enable the Airplane mode.
Step 3: Wait for some time and then tap on the Airplane mode again to turn it Off.
Step 4: Once it is disabled, check if the problem gets resolved or not.
Fix 4 – Disable the Call Forwarding Feature
If the Call Forwarding feature is enabled by mistake by the user, this can also lead to issues like this. So let us try checking whether the call forwarding feature is enabled or not. If it turns out to be enabled, please disable it using the steps explained below.
Step 1: First of all, go to the Settings page on your iPhone.
Step 2: Then scroll down and tap on the Phone option as shown in the below screenshot.
Step 3: Now tap on the Call Forwarding option under the Calls section as shown below.
Step 4: This opens the Call Forwarding page and it might take 1-2 seconds to load it.
Step 5: Disable the Call Forwarding option by tapping on its toggle switch to turn it off as shown.
Fix 5 – Disable the iMessage Setting and Enable it back
Some iPhone users have found that iMessage has got to do something with this error problem on the iPhone. Whenever the iMessage is stuck internally on any iPhone, it might cause such problems. So following the steps mentioned below might resolve this issue.
Step 1: Open the Settings page on the iPhone first and choose the Messages option by tapping on it once.
Step 2: Then tap on the iMessage option’s toggle switch to turn it Off as shown in the below screenshot.
Step 3: After it gets disabled, restart your iPhone.
Step 4: Once your iPhone starts, go to the Messages page and enable the iMessage by tapping on its toggle button to turn it On as shown below.
Fix 6 – Reset Network Settings
This error message can also be caused because some network settings have been changed unknowingly by the user on their iPhones. So performing reset network settings on any iPhone might help in resolving this error message using the following steps.
Step 1: Open the Settings page first and tap on the General option.
Step 2: Then select the Transfer or Reset iPhone option at the bottom of the General page as shown below.
Step 3: Now choose the Reset option by tapping on it once.
Step 4: This pops up a context menu and you need to tap on the Reset Network Settings from the list as shown below.
Step 5: This will ask you to enter the passcode of your iPhone to verify.
Step 6: After that, tap on the Reset Network Settings once again on the confirmation window as shown.
Additional Fixes
Update your iPhone
Apple releases updates from time to time after working on the feedback received from users. Therefore, users who have not updated the latest software updates on the iPhone might encounter such issues on their iPhones.
We recommend our users that update their iPhone or iPad using the steps below.
Step 1: Open the Settings page on their iPhone by tapping on the Settings icon from the home screen.
Step 2: Scroll down and select the General option as shown in the below screenshot.
Step 3: Choose the Software Update option by tapping on it as shown below.
Step 4: Wait till it checks if there are any updates available.
Step 5: After the Software Update page is loaded, tap on the Download and Install option at the bottom if there are any updates available.
Restart the iPhone
Restarting any device can sometimes fix any minor technical problems or software glitches within the device. So restart your iPhone once using the steps explained below.
Here are the steps to follow to restart the iPhone.
Step 1: To restart your iPhone, go to the Settings page.
Step 2: Then tap on the General option.
Step 3: Next, tap on Shut Down.
Step 4: Now follow the onscreen instructions to shut down the iPhone.
Step 5: For starting your iPhone, you need to press and hold the volume up and power buttons together till you see Apple’s logo sign on your screen.
See if the problem is resolved.