Hello Tony_Wang,
Sorry to hear you're having issues in your area. Have you had a chance to Ask Jack about the network status in the area? They would likely have more information on the matter than here, in the community. If the virtual assistance does not provide any assistance, you might consider contacting customer service. They can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
Hope this helps 😀
Cheers
