So quick question. I'm going to be trying out the T Mobile $30 plan, but was wondering if there is a way to buy an extra bundle of minutes that I can use in addition to the 100 that are provided with the plan. I think that I can get away with 100 per month but would like to have a buffer in case I am going over. If not, would getting an additional SIM card with just extra minutes (1000 for example) be a viable option? If I am getting close to going over in minutes and need to make a longer call, for example, I could just pop in the minutes only SIM. I'm on Verizon now so will be new to the prepaid SIM world. Thanks