True story: the most common fix for issues with data connection, text messages, and domestic and international calling is simply turning your phone off and then back on.
If that doesn’t work, remove and re-insert your Mint SIM card. By doing this, you re-register your phone on the mobile network. This is another common way to solve many problems related to data connection, text messages, and calling.
If you continue to experience issues, contact our support team at firstname.lastname@example.org.