Can you use a regular phone (one that is used for a 1 or 2 yr contract, paid monthly) on a prepaid/pay as you go plan, when both phones are from the same company? I am having difficulty trying to find the answer to my question even from the phone company. Which to be more specific. Right now i have a pay as you go plan from t-mobile, and bought the el cheapo $19.99 cellphone for the plan. However i hate, hate, hate the phone, and saw the new samsung gravity 2 berry model and wondered if i could use it on my prepaid plan. Yes, i do realize texting would be additional cost, but still cheaper to me for a prepaid plan. I could get it free with a 2yr contract, but i would be paying $40 per month instead of $25 every 3 months. I was looking online and was able to find it on amazon where i can purshase just the phone, which i was happy about b/c i went to the t-mobile sight and could not just purchase the phone, especially for as cheaply as amazon. Please can someone help me? Why do they have prepaid phones and monthly phones? Why can't they have phones that do both, is it special programming or another way to get more money from us?