Tmobile $30 Walmart plan tethering

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I have the Tmobile $30 5gb prepaid plan. I was using the native tethering but it seems that Tmobile can detect when I'm tethering. When I visit some websites from the tethered laptop it forwards me to Tmobile upsale webpage telling me that I should purchase tethering plan.
Some of the websites that still works on the tethered laptop are:
Http://www.Google.com but the search results get forwarded.
Https://*
This is the first time I encountered with this issue on the nexus one with Tmobile.
Is this permanent or temporary? Is there any way to bypass? Or am I flagged by Tmobile?
I keep record of my usage and I usually use about 2gb per month.
Sent from my Nexus One

Same issue :-/

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Hi,

I have a rooted G2 with Andromadus Audacity Beta 3 and I have the same issue with T-Mobile. Does anyone know if T-Mo is actually able to detect native tethering? I work around for this will be greatly appreciated. I will rather not waste $14.99 a month in a unfair tethering charge when my data plan is still going to suffer tottering after 5GB. I think that money could better be donated to our developers.