SIM Card -- Going from iPhone 5C -> iPhone 6S (T-Mobile)

Oct 20, 2005
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Hey all,

I'm upgrading my wife's phone from a 5C to a 6S today. She's with T-mobile. Do I just pop out her SIM card from her 5C and put that into the 6S and everything should be good to go? I know the SIM cards all fit between the iPhone models, but do I need or should I get a newer SIM card?

I'm on Sprint so I've never had to deal with the SIM card stuff.

Thanks for the help!