Update #2 ... just got back from retail store in D.C. --- employees are being told that there is a known data issue. Why did I go there? Well, 2 days later, after my Saturday night SIM-reprovision (see two posts above), it turns out approx 3pm today, everything stopped working again! Now they are providing work around to ADD APN! The retail store employee says everyone who got a phone also isn't working when it comes to MMS, Data and in some cases Visual Voice mail.
The settings are APN: wap.cingular
User Name:
wap@gprs.com
Password: cingular1
I am out of Visual Voice mail right now .... it's 8pm EST..... looks like the success of the phone on 4g/LTE is bringing down the AT&T network? Who knows .... we shall wait and see.
P.S. I am convinced it is not the phone. It is the AT&T network <again>... <sigh>