T-Mobile's new data plans, part two

Earlier this morning we reported on T-Mobile's changes to their broadband data plans. Now we are seeing that T-Mobile is also has plans in store for their phone data plans.
According to TMoNews, effective October 20, 2010 T-Mobile will introduce these new pre-paid plans:
- $70 Unlimited Text and Talk with 2GB of Data.
- $50 Unlimited Text and Talk with 100mb of Data.
- $30 1500 Talk and Text with 30mb of Data.
All of which basically eliminates the current unlimited data plans while lowering the cost just a smidgen. No words as of yet what going over the data limits will cost you. Charges could be levied by the byte or similar to AT&T's new plans that charge you a flat rate to extend your data allotment for that billing period (e.g. $10 for an extra 100mb).
Curious, are these data limits a good thing or bad? Will you miss the unlimited data or is 2GB's more than enough?
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George is a former Reviews Editor at Windows Central, concentrating on Windows 10 PC and Mobile apps. He's been a supporter of the platform since the days of Windows CE and uses his current Windows 10 Mobile phone daily to keep up with life and enjoy a game during downtime.