Cool Note APN settings

Hello,

I have the Sprint GN3 SM-N900P, I had my phone flashed to Verizon's Straight Talk. I am unable to send and receive MMS messages. I have narrowed it down to the APN settings on my phone. Does anyone know how to access the APN settings on this phone? I do ##3282#, edit, MSL code, more, LTE APN settings and I can see all the APN's?

APN0 EHRPD ota

APN0 LTE ota

APN1 EHRPD pam

APN1 LTE pam

APN2 EHRPD internet

APN2 LTE internet

GLOBAL Roaming - Sprint

Does anybody know a way to modify these?

Thanks,