Whitelistandregularusage plan? Really?

Thank you for posting! May have fixed my issue, but we'll have to wait and see.

I checked my account info and my data was mysteriously turned off as well. I also have the "WhitelistAndRegularUsage" listed as my Cellular Plan, which is obviously incorrect. I recently created a new account with an existing T-Mobile number and have had nothing but problems since then.
 

I have spent over seven hours speaking with the "T-Mobile experts" over the phone and chatting in the app. It is such an archaic experience and a complete waste of time. Each call/chat session lasts a minimum of 30-45 min, most of which is spent being put on hold a dozen or more times and/or listening to them constantly repeat poorly rehearsed phrases like, "I understand you are frustrated with your T-Mobile experience and will do everything in my capable powers to ensure we can find the problem that is currently ailing you at this moment in time. How does that sound to you today, kind sir, kind T-Mobile family member of honor?"

After changing my data to my Essentials plan via the Data/Add-Ons in my T-Mobile account and rebooting my iPhone, I am still seeing “WhitelistAndRegularUsage” as my Cellular Plan in my phone’s Settings, and the data is still not working.