The first solution for fix unfortunately the process android.process.acore has stopped error is a clear cache of application.
Please make sure before clear cache and data of the contact app you have taken backup of all your contacts. There are lots of apps available in google play store to back up the contacts list. Super Backup and Contacts Backup is the best application for backup your contact. For clear cache on your android device just follow the below steps.
Open setting application on your android device.
Go to Application manager and find the contacts app.
Click on the contact app and select the clear data option.
In application, manage finds the contact storage app and clear the data.
In android marshmallow 6.0, you will find a clear cache and clear data in storage option.
After clearing the app data restart your android device.
If the error is not fixed then you can also try to disable the contacts storage or follow the other solution is given below.
Solution 2: Clear Facebook Messenger Data
Disabling the facebook app can also stop the error occurring because facebook app connected with your mobile contact list. So clear data of the facebook app process is same as mention above. After clearing the facebook data disable sync for facebook messenger and delete all contacts. After that restart your android device. If you are still facing “unfortunately the process android.process.acore has stopped” issue then try a below solution.
Solution 3: Reset app preferences
For reset, the app preferences just follow the below step by step process.
First, open setting application on your android device.
Go to application manager and choose reset app preferences option.
Solution 4: Update Android OS
First, check any software update is available for your android version if any pending software update available on your android device then update to the latest version. Because if you update your software then errors are automatically fixed. So must update your android device to the latest version.
Solution 5: Clear System Partition Cache
Mostly this error occurs due to cache on the system partition. After clear the system partition cache, this error definitely solved. For clear cache in system partition just follow the below step by step process.
Turn off your android device.
Now press the volume up + power button + home button at a time.
And android system recovery screen will be open.
Use the volume up key and down key to navigate
Go to wipe cache partition and use the power button to confirm.
Solution 6: Clear Data Of Google Play, Google Play Services
This solution will work for you if the error is caused by google play service. After clear the data of google play store and google play service restart your android device. Also, you can update google play service.
Solution 7: Reset Your Android Device
After applying all above solution and you still face the error then only solution available is reset your android device. Before resetting your device backup mobile data. Factory reset process erases all the data and apps from your android device. For backup android device follow the below step by step process.
First, open setting app on your android device.
And find the backup and reset option
Now click on the factory data reset option.
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