If it's Hong Kong for 1 night and 2 days, which would be better, USIM or roaming?

I'm going to Hong Kong for 1 night and 2 days on the weekend.

If the schedule is long, I'll use USIM, but it's too short, so I don't know what to do.

I'm just thinking about using roaming

777 2018-12-12 Lady

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