I have a t-mobile data plan on my N900 that's supposed to be unlimited.

I noticed reduced data speed since last night. And this morning I found a message from t-mobile saying "You have used over 5GB of data this month. Your data speed has been reduced for the rest of your billing cycle per the terms of your data plan".

I searched around and found these links, that say t-mobile has indeed started throttling data speeds.
http://consumerist.com/2010/10/tmobi...tethering.html
http://www.tmonews.com/2011/05/opini...play-on-words/
http://www.broadbandexpert.com/blog/...ted-data-plan/

Internet on my smart phone is not really important to me. What's really important to me is unlimited mobile internet that I can use with my laptop. What are the options that I have?

One of the reasons I got a phone without a contract is so I can terminate a plan whenever I wanted. So I'm ready to sell my phone, terminate the plan, and get a new phone with just a voice and text plan. It depends on the choices I have, like are there any services, from t-mobile or any other company, that give unlimited mobile internet for a reasonable price. Does anyone know of any?