Found this forum and need input from everyone. Thanks in Advanced

Planning to visit shanghai this march and this is the first time for me to visiting main land. If i using TNG to pay by Alipay enough to pay everything in shanghai like restaurant & transportation?

Planning to enable data roaming via hotlink post paid can use whatsapp over there?

Is our GPS work correctly there by using their local map app?

Please share your experience what is the prerequisite stuffs to ensure smooth packages travelling there. Thanks