Samsung Galaxy Note 3 (CDMA)

I have the unlocked (CDMA/GSM/GLOBAL) Verizon 3 which I'm using on MetroPCS. Almost everything is working great, able to call, text and data on the phone itself. However, when calling and have to use the keypad for an automated system, it isn't recognized; when opening the option to tether to my laptop, a popup says that the mobile number isn't recognized. The APN is set correctly. Has anyone had this problem? Does anyone have any ideas?

Thank you!