Lot's for articles exist for Sprint APN settings, but most are for postpaid accounts. I was finally able to figure out the APN setting for prepaid. Why is this useful? Well, if you flash CM12 or a something similar, you need to configure the APN for LTE and MMS. With that said, the built-in messaging app with CM12 does not work for MMS, so just use hangouts or another app from the Play Store.
APN:
Name: Sprint
APN: n.sprpre.ispsn
Proxy: Not Set
Port: Not Set
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: http://mmsc.vmobl.com:8088
MMS Proxy: 68.28.31.2
MMS Port: 80
MCC: 310 (don't try to change, the apn will delete itself otherwise)
MNC: 120 (don;t try to change, the apn will delete itself otherwise)
Auth Type: Not Set
APN Type: default,mms
APN Protocol: IP4/IP6
Bearer: LTE
MVNO Type: None
APN:
Name: Sprint
APN: n.sprpre.ispsn
Proxy: Not Set
Port: Not Set
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: http://mmsc.vmobl.com:8088
MMS Proxy: 68.28.31.2
MMS Port: 80
MCC: 310 (don't try to change, the apn will delete itself otherwise)
MNC: 120 (don;t try to change, the apn will delete itself otherwise)
Auth Type: Not Set
APN Type: default,mms
APN Protocol: IP4/IP6
Bearer: LTE
MVNO Type: None
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