For travelling to China, it is recommended to get the SIM Card from ICC on Qoo10 (see link below). It has many benefits:
- Biggest benefit is that it can access WhatsApp/Google/Facebook which is otherwise blocked in China. The reason is that the cards are designed for Hong Kong /Macau, but yet can work in mainland China.
- Cheap and affordable. It should be much cheaper than using data roaming from Singtel/Starhub etc.
- Unlimited data. It has 3 GB for fast data (LTE speed). After that, it has unlimited data but at a throttled speed.
Do note that there is one disadvantage which is you cannot make or receive phone calls or SMS. But this can be easily overcome by using apps such as WeChat which has voice call and message services.
Official URL: https://qoo.tn/BadmHS/Q100000595