My boyfriend is about to go on a trip to Hawaii by himself for 10 days. He gave me his email in case I'm not able to contact him. Why?

Anonymous
My boyfriend said he might drop his phone or update it when he goes on vacay. In case I can't contact him he said to email him. Why would he do tell me to email him? Why would he decide to update his phone while on vacation? After his solo trip trip to Hawaii I plan to meet him in his hometown to meet his parents for the first time. Lately he's been calling me less on the phone less. He is a few days before going on his solo trip. Why is he giving me his email? Is this a red flag?
My boyfriend is about to go on a trip to Hawaii by himself for 10 days. He gave me his email in case Im not able to contact him. Why?
My boyfriend is about to go on a trip to Hawaii by himself for 10 days. He gave me his email in case I'm not able to contact him. Why?
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