So I was trying to obtain a T-Mobile Sim card for my iPad. At the T-Mobile store, they wanted to charge me $20 for a nano Sim card. $10 if I already had a T-Mobile account and that I would activate it with a plan. However, I do not want to activate an account so that I could use a 200 MB per month promotion for now. Does this sound right? You need to activate a plan or have an existing T-Mobile account to obtain a blank Sim card? Is this the same for ATT? I'd like to have the option of their plans as well... But don't want to be locked in to multiple plans.