How to use an old iphone with international sim card?

I'm going to be studying abroad in Ireland from January through May of this year. I just got a new iphone 8 last week and I still have my old iphone 6. I was planning on keeping my iphone 6 so I can use an international sim to get phone calls, data, etc. Since I've already activated my new phone and taken my old phone off the account, will I need to call verizon and have them unlock my old one(iphone 6)?

Go to sim card office.

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  • Using an old iPhone with international sim? I'm going to be studying abroad in Ireland from January through May of this year. I just got a new iphone 8 last week and I still have my old iphone 6. I was planning on keeping my iphone 6 so I can use an international sim to get phone calls, data, etc. Since I've already activated my new phone and taken my old phone off the account, will I need to call verizon and have them unlock my old one(iphone 6)?
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