I have a Samsung Galaxy S4 I9500 unlocked, bought from newegg unlocked. I used it for a month in Spain with a phone only micro sim from movistar, no problems, just used wifi for data. Now I am back in USA, bought straight talk micro sim (appears to be t mobile from default APN) and cannot get data/internet or MMS to work. Spent an hour on phone with straight talk tech support, they gave me two sets of APN data to try (see below). Neither worked, so they say the phone is bad.
Tried changing some parameters with what has worked for others in this thread, and big problem right now is that any time I change the MNC to 410 from 260, when I go to save the set of APN data it gets deleted. Any suggestions? Samsung says its a straight talk problem not a phone problem, including not properly saving APN data.
set 2
Name: Straight Talk
APN: att.mvno
Proxy: proxy.mvno.tracfone.com
Port: 80
User name: not set
Password: not set
Server: not set
MMSC:
http://mmsc.cingular.com
MMS proxy: mms2.tracfone.com
MMS port: 80
MCC:310
MNC: 260
Authentication type: none
APN type: not set
thanks for any help - Mark