Does your phone say AT&T now when you are connected? I was using the T-Mobile SIM and switched to trying the AT&T one but it still say T-Mobile even though I am using the AT&T SIM and settings.
Re: Verizon Galaxy S3 on At&t 3g/4g
Every time I change the
MMC: 410
it doesn't save the APN settings.
Also, shouldn't it be showing AT&T at the carrier now that I've switched it to the AT&T Straight Talk SIM?