Is it possible to use a standard SIM in an iphone 4 or 4s?

Is it possible to use a standard SIM in an iphone 4 or 4s?

No you'll need to either get a new "Micro sim" or if you want to risk it you can cut around your standard sim to make it the shape of a micro sim, I would just get a new one though, it's not as if they charge you for it

Yes it is, but you must cut the sim to fix new size.

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