I purchased a Verizon iPad rMini in January which I subsequently activated and used pre-paid month-to-month plans. A few weeks ago, I stopped auto renew on my Verizon prepaid account and jumped to purchase a T-Mobile SIM to get on their 200MB per month plan. The T-Mobile SIM did not work right away, I had to call them and get the iPad provisioned on T-Mobile overnight. Now, I am wondering if I have to re-provision the iPad back on Verizon when I decide to pop the Verizon SIM back in - which is not too far away since I have to use the SIM atleast once in 6 months to keep it active. I have heard stories about Verizon being really b**chy about provisioning pre-paid SIM's on their network. Do I need to brace myself for some hard-nosed negotiations; or can the iPad be provisioned on two networks and I have nothing to worry about when switching back?