更新1:
So, my Iphone says no sim on it, and I wanted to know if I can go to a phone company and buy a plan. I am a beginner at phones so I don't know anything about them, it's an Iphone 5c, i'f that helps
更新2:
I saw a thing on cricket that says "swap your sim for 99 cents plus tax. I forgot to say, I have a SIM card but it's from a Mexican company called Telcel, would they swap it?