Hong Kong prepaid SIM cards?

I'm going to Hong Kong with my family this May for 4 days. I was wondering if there are any recommendations for prepaid SIM cards for us to use while we're there? We all use iphone 5 and 5s. The main thing we will be using is Internet so are there any brands that would be best for that?

http://www.hongkongshuttle.com/prepaid-sim-card-3g-data/

Prepaid SIM cards are on sale in mobile shops, around HK$100 up, which can be found everywhere in the city state, including 1 - 2 in the HK Airport Terminal. Check with the Airport Customer Service where the shops are located.

In using internets, you don't need a HK SIM, just go to a place that has free Wi-Fi which again many places in HK do.

www.DiscoverHongKong.com

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