Good thinking... it's a Samsung S-III (s3?)

I think it should work. It was purchased in Hong Kong.

We need to keep her existing number and get the calls regardless of location. So I think the International Roaming option for China Unicom is likely the best choice.

@faraday - thanks I'll look into that too!!! Looks like we have two good solutions already!

@Yuantongsi - Brilliant. Any idea if this works with China Unicom? Have you tried it? Costs?

Thanks!

Does anyone know how to do this? We would leave her phone here (if need be), charged and on. It's an android phone, any app or other service out there that could re-route her calls. I know she can forward to another number within China.

Any ideas?