APN settings AT&T samsung galaxy S4

Edit the Options on your galaxy S4:
Operator: AT&T

Name: AT&T
APN: wap.cingular
Proxy: not set
Port: not set
Username: wap@cingulargprs.com
Password: cingular1
Server: not set
MMSC: not set
MMS Proxy: not set
MMS Port: not set
MCC: 310
MNC: 410
Authentication type: PAP
APN Type: Default