Originally Posted by
jiajun
That's a good idea. I used to use a prepaid one from CUHK that worked quite well. I think the data was HK $68 for 500MB (valid for 30 days) if I recall correctly. The data could be used freely between HK, Macau, and mainland. The SIM card had both an HK number and a China number, incoming calls were free in both HK and China.
I have one of these dual number three region account $160HK/month, unlimited calling, SMS and 6g of LTE /4G (SIM). The data traffic is roamed through the HK server. I use it as my personal business is run on G-Suite. It is also handy for not having to download google maps. Baidu map is better but there is too much spam from them once you use their maps.
HKers have this to use their Gmail account and broadcast on social media to show their friends how much fun they are having dining and shopping in China.