Everything except making and receiving calls works. Please help.

I have a Le Echo - Le Max 2, which Verizon states is incompatible with its services. However, after putting my sim card in, it worked fine, with the exception of mms and making/receiving calls. I created a new APN with appropriate settings and this remedied the issue with mms, however I cannot figure out a method for getting the calls to work:

-When someone else calls me, it goes straight to voicemail, which I do not have set up.

-When I try to call someone, or dial a USSD code, it does not reach the network, and eventually gives up attempting to connect.

APN settings include:

• APN: VZWINTERNET
• MMSC: http://mms.vtext.com/servlets/mms
• MMS port: 80
• MCC: 311
• MNC: 480
• APN Type: default,dun,supl,mms
• Bearer: LTE

All other settings are default.

Any and all help is greatly appreciated, thank you in advance!