In the past few months, many T-Mobile users have been complaining that the T-Mobile diagnostics keeps stopping and showing an error message.
Don’t get all worked up if you’re also experiencing this problem. We’ll fix it in no time.
The T-Mobile diagnostics app could stop because it’s outdated, corrupted, or full of data. You can quickly fix this issue by disabling background data usage, clearing the cache or updating the app.
Now that we know this issue is routine and there are a couple of troubleshooting techniques to restore normalcy, let’s get into the details on how to fix it and ensure it doesn’t happen again.
The T-Mobile app makes your mobile life easier by allowing you to manage and maintain your account and services through your smartphone.
However, this can be impossible if the app keeps crashing often.
Here are the possible causes for this frustrating issue:
- The app could be outdated.
- The easy mode could be enabled while you’re using the app.
- The app might have accumulated junk data.
- The T-Mobile app installation files could be corrupted.
- You could be trying to open the app with a VPN in the background.
The following troubleshooting techniques can successfully resolve the T-Mobile app error:
Most smartphone users think that when they close an app on their phone, it stops running entirely. This is a stray further away from the truth.
The closed app stays active in the background and continues sending notifications while remaining updated to the latest content.
Consequently, you need to completely turn off and relaunch the T-Mobile app by forcing it to close.
Tip: A force start will help the app eliminate any issues it might be experiencing momentarily.
To force close the T-Mobile app on an Android phone, Go to the Apps Manager and select the app. Under the App Info, click on Force close.
To do this for an iPhone:
- Open the App Switcher.
- Go to the T-Mobile up, then swipe up to force close it.
- Relaunch the app and check if this solution fixed the problem.
Updating your T-Mobile app is also another effective solution for this menace.
Here are the steps for doing it:
- Connect your phone to a stable WiFi network or mobile data.
- Go to the Play Store on an Android or the App Store on an iPhone.
- Tap on the Profile Picture icon and click on Manage Apps and Device.
- Click on Updates available, then check if there’s an option to update the app.
- If there is, click on Update to download and install the latest version of the T-Mobile app.
You could also uninstall the T-Mobile app and then, later on, reinstall a new version from the app store.
This way, you’ll get rid of all the bugs that could be causing it to keep stopping.
- Go to the Google Play Store app.
- Tap the profile icon at the top-right corner of the screen.
- Click on Manage apps and devices.
- Select the T-Mobile app.
- Click to uninstall.
- Touch and hold the T-Mobile app.
- Click on Remove app.
- Select Delete app, then tap on Delete to confirm.
The VPN could be interfering with the normal functioning of your T-Mobile app. You can try disabling it to see if it fixes the problem.
These are the steps for disabling it:
- Go to the Settings.
- Select Network and Internet Advanced. Choose VPN.
- If you can’t find it, get help from the device manufacturer.
- Tap Settings next to the VPN you want to disable.
- Turn it off to disable it or select Forget to forget the VPN.
- From the home screen, go to Settings, then General.
- Select VPN and Device Management.
- Tap the status switch on the VPN Configurations page to turn it off.
Occasionally, a smartphone’s operating system could fail to support the app whenever you attempt to launch it.
This is especially common for Android-powered devices. Therefore, if you have an iPhone nearby, you can download the T-Mobile app and check if that solves the issue.
Tip: The T-Mobile app can run on Android 6.0 or higher and iPhones with Apple iOS 10 or above. Unfortunately, it can't work on the iPad.
The easy mode feature in Android phones allows users to choose certain apps to display on the home screen as huge icons.
The T-Mobile app seemingly works poorly when you enable the easy mode on your phone.
Try turning off the easy mode feature on your phone, then launch the app. Keep your fingers crossed that this tip works.
To Disable this feature:
- Swipe left on the home screen and click on Easy Settings.
- On this page, you’ll see Easy Mode and Standard Mode.
- Select Standard Mode and tap Done to confirm.
The T-Mobile app could sometimes keep stopping because background data usage is enabled on your phone.
Background data usage lets the apps on your phone roam on the internet searching for new information despite them being inactive on the screen.
Even though background data usage enables you to receive the latest information immediately.
It can prevent your smartphone from performing optimally as it takes up too much battery life and data. As a result, the T-Mobile diagnostics app keeps crashing.
Here’s how to turn off background data usage on your Android device:
- Go to Settings on your phone, then select SIM card and Mobile data.
- Select Data usage and then click on Mobile data usage.
- Find the T-Mobile app and click on it.
- Turn off the Background data settings.
- Return to the Data usage tab and select WiFi usage.
- Select the T-Mobile app once again, then turn off the Background data settings.
- Go to your iPhone Settings and click on the Menu icon.
- Click on background app Refresh.
- Now turn off the background app refresh.
- You can also turn off WiFi and Cellular Data options, which do the same thing.
The T-Mobile app collects so much data in its cache to improve its performance. It’s beneficial, but also has some shortcomings.
These cached files can become extremely overwhelming for the app or corrupt it, causing issues like the app stopping frequently.
To clear the cache on your phone, follow these steps:
- Go to Settings, select App management, then tap on App list.
- Find the T-Mobile app and select it.
- Head to Storage usage and click on Clear cache and data.
- Confirm the selection when prompted.
- Navigate to Settings and select General, then Storage.
- Tap on the T-Mobile app and click on Offload App.
- Confirm the option when triggered.
The T-Mobile diagnostics app frequently stops because it could be packed with junk data, outdated, or interfered with by background apps. Troubleshooting tips for this issue include force-stopping the T-Mobile app, uninstalling and reinstalling it, or disabling VPN and other background apps.
Read Next: Can T-Mobile Transfer Data To New Phone?
Now that we’ve learned why the T-Mobile diagnostics keeps stopping, I trust that you can use these solutions to quickly fix this nuisance whenever it arises.
If the issue persists, it would be best to contact T-Mobile customer service. Their dedicated
Kevin has over five years of experience working in various Tech startups and providing Technical solutions. He has contributed to many Tech publications and websites.