I just got the text message. I think I'm ok, but I have no idea how much data I use over their network each month. Most of my high-bandwidth usage like streaming podcasts is over my home wifi network.
Here's the text message i received, and the text of the link. Sounds to me like they'll unthrottle you if you pay for the next month of usage immediately.
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VMFreeMsg: Your Beyond Talk Plan is about to change. Starting 3/23/12, data speeds may be reduced once you hit 2.5GB. For more info, click http://msg4u.us/th2
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To make sure we can keep offering our Beyond Talk Plans at such great prices, we're putting a data speed reduction in place for anyone who uses over 2.5GB of data in a month.
Will it affect me?
Based on your activity for your last plan month ending in December, you shouldn't be affected.
If you continue to use the same amount of data as you did in your last plan month, you should not see your data speeds reduced. Just to give you an idea, in order to hit 2.5GB, it's about 400,000 Mobile Internet page views, about 90,000(!) emails (without attachments), 91 hours of streaming music or 20 hours of video clips*.
This will not affect your ability to text or make calls with your phone.
How will it work?
Starting March 23, 2012, if you use over 2.5GB of data in a month on your Beyond Talk Plan: