If your Android phone or tablet is losing mobile data connection, then you need to check this article. It shows the 10+ solutions to fix the issue of mobile data not working on Android devices.

Over 500 million Android devices have a flawed implementation of the factory reset feature, leaving user data vulnerable.

Press the Volume down key several times to highlight ‘wipe data / factory reset’. Press Power button to select. Press the Volume down key until ‘Yes’ is highlighted.

An estimated 500 million Android phones don't completely wipe data when their factory reset option is run, a weakness that may allow the recovery of login credentials, text messages, e-mails, and ...

Unfortunately for Android users, researchers from Cambridge University recently discovered that performing a data wipe on Android devices doesn't clear the device as one would expect.