So I recently decided to switch my unlocked iPhone 5 from the $30 prepaid plan to the unlimited voice/text/data postpaid plan, since my employer has arranged for a corporate discount on postpaid plans.
T-mobile sent me a new sim card, and I activated it on Friday in the same phone I've been on prepaid. Immediately I lost data access on the t-mobile network. (Voice and SMS work fine.) Prior to the switch, I never had this problem.
Now, loading any web page ends up redirecting me to a captive portal at u.web2go.com/upsell/upsell.do, which states "Your line does not have a Data Plan. Click here to choose one of our data plans."
I've chatted with and called T-mobile support multiple times... They've verified my APN and other settings are correct, verified that my line should have unlimited data, tried removing and re-adding the data plan to my account, etc. Nothing has worked. They have claimed that it is only affecting iPhones, and that I should push Apple for a patch. When I called Apple support, they got a manager on the line who took my info and called over to T-mobile. T-mobile then admitted that the issue had to be on their end, and finally filed a trouble ticket.
But supposedly it is going to take up to 72 hours for T-mobile to resolve the ticket, and the dude I spoke to doesn't work Tuesday or Wednesday, so I won't be able to get a status from him until Thursday.
I wonder why it's so difficult to resolve a data plan configuration issue?