If I buy an unlocked Iphone, Can I use it with a prepaid phone plan?

So I was going to buy an unlocked iphone 4 on craiglist for about 250 and my family doesn't like the thought of being on a contract. If I buy this phone will I be able to use with a prepaid phone plan.

Providers like Tmobile can work but I don't know about other sim cards.
Also, you shouldn't of bought the iphone 4, you will see its disadvantages soon.

  • Where can i get a good prepaid cell phone plan with data for my iphone 4? I have an iphone 4, with an at&t go phone sims.at&t says the only way i can get internet is if i'm connected to Wi-Fi. Why is that? I have unlimited, talk, text &web plan & my phone i used before was not a smart phone
  • What's a prepaid phone? Can IPhones be prepaid? I'm going to buy an IPhone 4 from my friend and i'm wondering if it can be prepaid? If so do I need anything like a sim chip? & It's not on contract… Or could I just go on a plan without being on a contract?
  • What prepaid phone plan can I use with my iphone 5c? I have an iphone 5c that I used on sprint, the person who I had a contact with cancelled her plan. I don't want to sign up for a contract with sprint and am shopping for a prepaid plan. Is there a prepaid plan that I can use my iphone 5c from sprint with? Straighttalk doesn't work unfortunately
  • Is it cheaper to get a new iPhone on a plan or buy it unlocked and add a cheap plan? I can either buy the phone for $250 and pay a monthly $80 plan with data for 2 years or purchase the unlocked phone $800 and pay $30 - $50 a month - I might not get data but it wouldn't be a big deal to me, I'm just trying to find a deal thats not ridiculously expensive cause I can't really afford too too much right now. Which would be better?