If my iPhone 6 is broken, will my call still go through?

My phone slipped out of my pocket while on a roller coaster yesterday and while the workers are looking for it, I want to know if it's broken beyond repair. When I tried to call it, my call went through, rang the typical amount of rings then went to voicemail. Does this mean my phone could be okay? Or could it still be broken?

It could be okay, but it might be broken, but I'm not a engineer, so I would take it to a technology Repair person (I forgot what you call those people lol)

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