Creating a SIM card from a prepaid GSM phone that doesn't have a regular SIM card

[SBTlauien]

Please excuse my ignorance...

Is it possible(and if so, how difficult) to buy a prepaid phone that comes with an unlimited data plan(3g+4g), but doesn't come with a regular sized sim card, and then copy the SIM card data to a regular SIM card so that it would work in a phone that allows tething?

That way I could tether for big downloads/updates without upsetting my carrier.

I've looked up the SIM card reader/writers on Amazon, and I'm not sure if they are only for phone entries, or the whole card.

[Blux]

Is the SIM it comes with just a miniature SIM? If so you can get adapters that will make them fit in a regular SIM tray

[SBTlauien]

Yes, it's like a small chip on the circuit board.

[Zok Jr.]

Just cut a hole in a regular sim so that the micro sim lines up with the pins its easy and pretty much free almost everyone has an old sim card laying around.