Have you ported your number over to a new phone carrier and the carrier that YouMail detected for your device is not correct?
If you only have 1 phone number on your account, you can update the carrier for your device on YouMail by clicking here.
Do you have multiple lines on your account but need to change the carrier on a specific line?
1) Go to the YouMail Website by clicking here.
2) Refer to the image below for reference. Click on the incorrect carrier name next to carrier.
3) Select the correct carrier from the drop and save your new carrier.