iPhone 6: Data not working on T-Mobile?

I recently switched from Verizon to T-Mobile's Simple Choice family plan with unlimited talk, text, and unlimited 2G data (with an additional 2.5G 4G data/month until 2016, it will drop to 1G 4G/month).

I have full text and call functionality (sending and receiving), but my Data simply does NOT work. It always shows that it is connected to the network (4G, LTE) with 4-5 bars, but it has not once worked since I've had the phone. I can use Wifi just fine.

On the My T-Mobile account app, I go to Device Support > Technical Support > Data Plan Check and it shows this message:

"Your current data service is not compatible with your device...."

Using Safari will pull up the u.web2go.com page that states this:

"Your data plan does not work on this device...."

I called the stand-alone T-Mobile store I activated the phone from and they said my account information is correct and the data plan is up and going so there should be no issues. (Other family members on my SAME PLAN also received the iPhone 6 and have NOT had any issues with data.) The T-Mobile representative told me to try the same stuff I had been trying, such as turning off my phone, resetting my phone, etc and none of that worked.

When it was finally 24 hours from activation I called customer care. For some reason calling before 24 hours has passed will only get you thrown into the "it hasn't finished syncing and we can't help you" category. He checked the network in my area and nothing was down. We tried the same things the local T-Mobile store recommended and he even checked I was up to date with iOS (8.0.2) and the Network I was trying to connect to was correct. He submitted a ticket to the advanced team to fix how my phone is receiving the network signal. He told me to turn off my phone every 2 hours and it should start working within the next 3 days. Bummer, because I am PAYING FOR MY PHONE RIGHT NOW. Simply unacceptable that this is happening and I really, REALLY hope this works.

Has this happened to anyone else?