HELP! I'm officially dumbfounded with my sudden data connection issue
I'm having a sudden issue as of last Friday (2/10) that makes no sense to me, anyone at the Apple store, and anyone at AT&T's tech support. Please feel free to offer up any advice or experiences you may have had that could possibly help me resolve this.
Background: I've had an iPhone for the past 3 years or so. Started with a 3GS, then a 4, and then got the 4S on launch day. For the past 3 years of owning an iPhone, while at work I have listened to 6-8 hours of streaming internet radio every day, along with using my phone for normal things like email, Facebook, Twitter, etc. I have NEVER had any issues with any of the phones or my AT&T service, until last Friday. I've always had 3-5 bars of AT&T 3G signal strength from day 1 of owning an iPhone.
The Issue: All of a sudden, as of last Friday when I got to work, I couldn't connect to the internet on my phone AT ALL. I couldn't stream anything. Trying to check my email would take several minutes, if it would even go through at all without timing out. The phone worked fine before I got to work on 3G, it worked fine after I was out of the building and into the parking lot a bit. My signal NEVER got lower than 3 bars of AT&T 3G. No changes have been made to our building to all of a sudden cause any issue. Also, there's 2 co-workers who have AT&T iPhones, one a 3GS and one a 4. Neither of them have ANY problem connecting to the AT&T data network. So it's apparently just me. Just when I'm inside the building I work at. I can not figure out what is going on, but after 3 phone calls and 2 web chats with AT&T Tech Support (the 3rd call was with a Tier 2 rep), here's all the things I've tried to solve the problem:
1.) MANY power cycles/reboots of the device
2.) Removed SIM card multiple times
3.) Reset network settings
4.) Cleared history, cookies, cache, etc
5.) Did a phone restore via iCloud
6.) Went to Apple store to get phone replaced through warranty and got new SIM card from AT&T on same night
7.) After restoring the new phone with a backup of the previous phone and having no success, I...
8.) Did a restore as a new device
9.) Several times, the AT&T people essentially re-activated my phone(s), which included receiving the "Welcome to AT&T Wireless..." text that new customers receive
10.) More resets of the network settings
There may be one or two steps that I've tried that I'm forgetting. None of these steps have eliminated the problem. I will admit that today, I could sporadically connect well enough to check email, or get Twitter updates, or even stream a minute or so of internet radio. But the connections were extremely short-lived, and extremely sporadic.
Nobody at AT&T seems to have any clue as to what the problem could be. It worked fine for years and then, all of a sudden.....POOF! No more internet of any kind for me. Just me. Just at work. Anywhere inside the building. Nothing affecting the 2 other AT&T iPhones in the building, and nothing affecting my data connection ANYWHERE else other than at work. It's not my equipment; it's been replaced. It's not AT&T; I have good signal and no issues anywhere else. I tried suggesting to the AT&T reps that maybe there are settings/parameters/configurations specifically on my account behind the scenes somewhere that could possibly be causing this, but I was told that's not possible.
So, I beg of you...if you have any ideas, suggestions, experiences or whatever, please post them. This is driving me CRAZY!!!!!
EDIT: This data issue is also affecting iMessage. Regular texts and phone calls go through just fine though.