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I'm traveling internationally and I'm removing my SIM card. Even if I don't have my phone number connected to my iPhone by the SIM card, will it still be connected to iMessage for people to contact me through? Should I tell them to text my Apple ID email(s)? Or well I still be able to receive the messages if they text my phone number?

marked as duplicate by Allan, Andrew Larsson, bmike Jun 19 '16 at 1:30

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I don't have an iPhone myself, but because the account can be based on email address as well, I believe it in theory should be possible to keep using iMessage after removing your sim. However, I have experienced that my friends who have gone overseas and used a different sim have ended up having iMessage being connected to the new number. In other words, it is possible to connect to you via iMessage, but your new, overseas number will need to be made known.

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