Iphone 4s sim card will fit in iphone5?

Iphone 4s sim card will fit in iphone5?

Mine fits in the 5. Try cutting it to the new size

Well I don't know what is the I phone sims sizes but if it is bigger they will just cut exess plastic around itand if it is small then the I phone 5 will probably be small too

You'll need to get it cut my aunty had a 4s and just got the 5 and she had to get hers cut to fit the size

The iphone 4s uses micro sim where the iphone 5 uses the smaller nano sim. But you can try cutting the sim to fit in the iphone 5. Thats tedious to cut already small micro sim to even smaller that may drive you nuts.

Use this:
http://www.redmondpie.com/how-to-convert-micro-sim-to-nano-sim-for-iphone-5/
just follow that guide when you upgrade your phone and you'll be all good
but if you are upgrading through your carrier then the phones come with SIM cards in them and are usually activated to your service by the store so there's no need to swap the SIMs

No.

4S uses microSIMs
5 uses nanoSIMs

nanoSIMs are smaller than microSIMs.