Nutshell:
iPhone 5S screen cracked, bought an iPhone 6, wiped the data, sent it to my uncle for repair, and gave it to my father.
When I got the 6, I got a new SIM card.
I never took the SIM card out of the 5S.
1. Can my father use my SIM card or does he need to get a new one from Verizon?
2. If he can use mine, is there any downside fir either me or him?
He's upgrading from a Blackberry Storm.
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