Can I surf the Internet with my mobile phone in Vietnam?

Global card: international roaming, phone calls and internet access are available. First of all, you have to pay a deposit of 1 0,000 yuan to start this service in China Mobile. After returning home, you can return it according to the call calculation. If you don't open it, there will be no signal, and there will be no signal after Vietnam's border defense information enters Vietnam for 2 kilometers. Telecom PHS is no good.