Well. I confirmed that this is not charged to my account. I have been using it nonstop for 2 days straight and I checked our account on TMOBILE.com and it does not show that I'm being charged.
Furthermore, I put in my mom's Tmobile SIM and does NOT even get the 3G or Edge signal! This confirms what someone else said - Tmobile doesn't charge you 3G or Edge unless you have the plan or accept the charges over the web before you use it. This is looking pretty sweet

But I have to wait 2-3 months to see if they notices or any charges showing up
The problem with the Nexus is that everything is not on par with the iphone: screen, apps (the fb app sucks!!!), calenders, interface, typing
BUT it does have tethering - which means I can now cancel my iPad's $30/month plan and save $360 per year and still be able to tether to all my devices when Im on the go. Not to mention I'm loving push notifications from my emails, fb, and twitter in real time.
I'm leaning more towards the Nexus but I am not selling my iphone 4 any time soon. I will see to it that this stays free for at least 2-3 month. I'll probly just use Edge on the iphone for 2-3 months mix with some 3G usage on my Nexus and see if charges show up

In any case, I will keep you guys updated. I definitely hate to not use my iphone though
