AT&T Galaxy S3 SGH-I747 APN and 4G LTE PTA Settings!

When you install custom ROMs on the AT&T Galaxy S3 SGH-I717, you might have to manually set your APN and 4G LTE PTA settings, here’s the settings you need:

For 4G LTE PTA/HSPA+:
Name: PTA
APN: pta
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Auth: none
APN type: default,mms,supl,hipri

For HSPA+:
Name: AT&T
APN: wap.cingular
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC:310
MNC:410
APN type: default,supl,mms

You can also use this method to switch between HSPA+ or 4G LTE on your phone to save battery life.

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