I am going to try and consolidate all of the questions I have here:
Can I use the Verizon iPhone5 with a GSM carrier in Europe (Vodafone) and in India (Airtel or Aircel) with both calling and cellular data working properly?
Question 1 extended: Could I use it on the GSM carriers whilst on a 2 yr contract with Verizon? (The way I understand, it does come unlocked??)
On ending my contract will I be able to pop in a t-mobile sim and use it in the US?