Iphone 4 will not recognize US Sim cards?

i bought used iphone 4, , not recognize sim cards. apparently used in mexico (found out after purchase) , im being told needs original sim in order me able use it? doesnt make sense me. im pretty sure phone locked at&t, there sort of lock on international use or something? appreciated.

 

zero1994 said: ↑

i bought used iphone 4, , not recognize sim cards. apparently used in mexico (found out after purchase) , im being told needs original sim in order me able use it? doesnt make sense me. im pretty sure phone locked at&t, there sort of lock on international use or something? appreciated.

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its not locked at&t. if you'd able activate at&t sim.
, no, at&t doesnt put locks on phones international use only.
guess iphone locked mexican carrier or maybe carrier outside us.
if had sim original carrier locked able activate , homescreen.
still wouldnt able unlock , wont recognize or accept other sims carrier locked to.
either way @ lost cause.
02.

 

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