Which mobileserviceprovider are you using currently?
现时使用哪一间网络供应商?。
2
Do you still choose your current mobileserviceprovider, if you would like to switch your 2g mobileservice to 3g mobile service.
假如你想把你现有2g门号转换3g服务，你是否仍会选择你现在的手机系统商。
3
How to minimize the financial cost of the infrastructure without sacrificing QOS are the key topic of the survival of mobileserviceprovider and also the key topic of this thesis.