I have two SCH-I545, one on NC5 stock rooted, one on MDK running CM11 nightlies. I got a Cricket sim and service for a month to see if I could get everything going, and all but LTE is golden. If anyone has any help for me on getting LTE going, I would certainly appreciate it. I believe Cricket uses the AT&T LTE network around here, but I am unsure. The NC5 phone has a constant notification:
This SIM card is from an unknown source.
I believe there are ways around that.
Below are the APN settings from their website which I can confirm get up to HSPA+ and MMS working:
Proxy: Not Set
Port: Not Set
Username: Not Set
Password: Not Set
Server: Not Set
MMS Proxy: proxy.aiowireless.net
MMS Port: 80
Authentication type: Not Set
APN type: default,mms,fota,hipri,supl
The only differences between the ones on their site and those successfully pushed to my MDK are the name and the pushed did not include "hipri," in the APN type. Both worked fine except for LTE.