Is there any way I can message on an iPhone without a SIM card?

Okay, long story short. So I'm going on a High School trip for three days soon, and I really want to be able to contact my family. We're allowed to take our iPhone's but we have to take out the SIM cards. Is there any way I can contact my family without one?

When the sin card is taken out i think the phone can still get apps and work like an ipod so you can just download one of those free texting apps but you need to have internert connection

Using imessage.instead of sending to a number send it to their email… Provided there's wi-fi available…

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