Quickly Fix *101# Error on iPhone

The iPhone's inability to check the *101# account balance in the usual way can be frustrating and inconvenient for users, who can only check their account balance or top up by calling the 900 hotline. In fact, the *101# syntax for checking the account balance is specific to Vietnamese carriers, so you won't be able to use this syntax for an unlocked iPhone using a SIM adapter. So, what can users do to fix their iPhone's inability to check *101#? Follow this article to understand the causes and solutions to this issue.

Fixing the iPhone Error: Unable to Check Account Balance *101#

Fixing the iPhone Error: Unable to Check Account Balance *101#

I. Causes of iPhone's Inability to Check *101# Account Balance

- The main cause of this issue is when the iPhone is locked and unlocked using a SIM adapter.
- Another reason is network errors or no network signal.

II. Solutions to Fix iPhone's Inability to Check *101# Account Balance

Method 1: Use Carrier Apps to Check Account

Currently in Vietnam, the majority of users are with Viettel and VinaPhone networks, so you can download the network's apps to quickly and efficiently check your account balance and top-up.

- For VinaPhone network: Download My VNPT here.
- For Viettel network: Download My Viettel here.

Method 2: Purchase Code for Locked iPhones

To fix the issue of iPhone unable to check *101# account balance, you can opt to purchase a code for locked iPhones instead of unlocking them with a SIM adapter. Although this method may incur some extra costs, you'll have an iPhone that functions like an international version and no longer encounters the *101# account check error.

Method 3: Check Network Signal Again

When there's no network signal, not only can you not check your account, but you also can't make calls or send messages. Therefore, you can move to an area with stable network coverage provided by your network carrier to perform the account check.

To implement this method, your device must be jailbroken, install iFile from Cydia, and have the /var/mobile/Library/Carrier Bundles/Overlay directory. If not, you can skip this step because you'll need to wait for another method to fix your iPhone.

To execute this method, your device must be jailbroken, iFile must be installed from Cydia, and have the /var/mobile/Library/Carrier Bundles/Overlay directory. If not, you should skip this article as you will need to wait for another method to fix your iPhone.

1. For SoftBank, AU, docomo networks:

Step 1: Use the iFile app on your iPhone to navigate to the path Var/mobile/Library/Carrier Bundles and tap on the (i) corresponding to the Overlay item.

Step 2: Locate the ACCESS PERMISSIONS section, tap on User, uncheck the Write option, and then tap Done as shown below.

Note: This step is to grant permission to only 'read and execute' for the Overlay directory. If not performed or performed incorrectly, you won't be able to fix the iPhone *101# account check error.

Step 3: Return to the Overlay directory at /var/mobile/Library/Carrier Bundles/Overlay. Here, tap on the file named “device+carrier...P+15.5.1.plist” and select “Property List View” in the popup.

Step 4: In the new interface, locate the SupportsSupplementaryServices line and switch it to ON as shown below, then press Done to save the settings.

Step 5: Reset your iPhone and check with the *101# command to verify your iPhone account.

2. For SoftBank and Docomo networks, skip this step. For AU network, complete the following:

Continue using iFile and navigate to the path System/Library/Carrierbundles/iPhone, then delete the corresponding lines for each network:

44020 Softbank

44050 AU

For other carriers, navigate to System/Library/Carrierbundles/iPhone/your_carrier_name, copy the carriee.plist file to your computer, and locate the SupportedSIMs line to see which items need to be removed.

Next, go to /Var/mobile/library/preferences/com.apple.appsupport.plist, find jp and us, and change them to vn.

Reboot your iPhone and check if it's checking the account yet.

So far, we've guided you through fixing the issue of iPhone not checking the *101# account. Additionally, if your device hasn't been jailbroken, you can also apply a small trick to fix the *101# error on non-jailbroken Lock iPhones, which we previously shared. Interested readers can refer back to the article on fixing *101# errors on non-jailbroken Lock iPhones.

https://Mytour.vn/khac-phuc-loi-iphone-khong-kiem-tra-duoc-tai-khoan-101-2704n.aspx
Here, we've explained how to troubleshoot the issue of iPhone not checking the *101# account. Furthermore, if your device hasn't been jailbroken, you can try an additional useful tip to fix the *101# error on non-jailbroken Lock iPhones, which we've shared earlier. Interested readers can revisit the guide on fixing *101# errors on non-jailbroken Lock iPhones.