How to use iPhone 5s as iPod? Read the whole description please and

I bought an iPhone 5s jus today. I have my sim card ready but just need to go to the store and get it in the phone tomorrow. So basically the sim is not in the phone. So my question is CAN I USE MY PHONE AS AND IPOD AND THEN TOMORROW PUT IN THE SIM CARD WITHOUT ANY EXTRA CHARGES OR ANYTHING LIKE THAT? Thanks

Added (1). my question real his can i set it up and download games and stuff and use it like a iPod without any extra charges and then after can i put in the sim card without any thing going wrong thank you please answer quick thank you

Added (2). thank you a lot guys your answers helped a lot all of you did
one more question if i use it as an iPod can i get the sim in tomorrow without any extra charges or anything

The SIM card is only needed to identify the phone to the carrier. Phone calls, data connection and texting - that's all that's disabled without a SIM card.

In every other respect, an iPhone without a SIM card is an iPod.

Absolutely!

And - if you have accounts with cloud storage, you can start stashing TONS of music - for FREE - all over cyberpsace, so you will never ever run out of room on your phone, due to tons of music.

Yes, you can use it just as an ipod touch but be aware if you buy it on contract price then you pay the 2 year contract whether you use it or not.

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