我用Voip.ms value route打中國上海...

那邊顯示的是上海普陀區什麽的，他們還以為我回國了。

VoIP.ms Frequently Asked Questions
Do you pass callerid?

On our premium route, All US/Canada destinations will receive proper callerid. On the value route, we can not guarantee callerid will pass 100% of the time but it should in most cases.

順便說一句，VoIP.ms 讓你隨便填個Caller ID (言下之意：you can do caller id spoofing, which is probably not legal anymore)

If you are using an ATA, IP Phone or Softphone, you probably want to set this here. It is important to pass a valid caller id to ensure proper termination. If you have a a device capable of passing its own CallerID number such as a soft switch or PBX, you can leave this blank to set the CallerID on your side