Hello, I currently am using an iPhone 5 and will be upgrading to the next generation iPhone this fall. Instead of just letting my iPhone 5 sit around or sell it, I'm giving it to someone on our plan who is using the iPhone 4 with the original unlimited data plan. As you know the iPhone 4 doesn't use a sim card so how would she upgrade to a used iPhone 5? Will we have to request a sim card with her number and will that cost anything?
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