How to change an Iphone 4s Sim card into a Normal sim card?

I need some help here,
I just upgraded my contract phone to an Iphone 4s but I have got a problem.
I was thinking of upgrading it but giving the handset to my daughter and keeping the sim card so I would have the sim card practically the minutes and etc, but she would just have the Iphone 4s but then I realised that The iphone 4s sim card is different? So how will I be able to put in the iphone 4s sim card into my normal sony ericson phone? And how would she put a normal sim card into her iphone 4s?
someone please answer me.

Sony phone can't use the "micro sim"
Iphone depending on the model. You can cut a normal sim to fit an iphone… Check with someone though.

On ebay you will buy able to buy a special casing for sim cards (can't remember the name) you can put your sim card in it and place it in a normal phone, your daughter can get her sim card trimmed. If you live in or near chester go to griffs swop shop at 102 brook st. My dad owns the place and they will tell you what you need to know and cut your daughters sim card for you so you can use it in the iphone hope this helps: P

You can use the micro sim in a mini sim phone but you'd need to use a plastic border to make it the same size as a mini sim. If you have an old sim card lying around you can simply trace your micro sim on the larger sim card and then cut out the core of the old sim with a razor blade (carefully).

You can buy a sim adapter on amazon or ebay.
or just cut a old credit card or plastic to fit

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