If you have just purchased a new cell phone card, because you do not have enough trips to be able to support the query of the trip big data, or the problem of the network system.

This situation may be due to the poor signal of the surrounding environment, or signal blind zone, at this time there is no signal is a normal phenomenon, it is recommended to move around, looking for a better signal place, or leave the signal blind zone. It's also possible that the system that comes with the phone is malfunctioning, so you can turn the phone off and then restart it again to allow the phone to connect to the network automatically.

There is also a possibility that the local mobile operator is having problems with the signal towers due to some reason, such as thunderstorms or typhoons, and you can only connect to the network after the operator has carried out emergency repairs.

Introduction of Trip Data Service:

The "Communication Big Data Trip Card" is a free query service provided by the China Academy of Information and Communications Technology (AICT) in conjunction with the three basic telecommunication enterprises, China Telecom, China Mobile and China Unicom, for the nation's 1.6 billion cell phone users by using big data of communication, and it is an upgrade of the service of querying the trips through SMS previously.

"Communication big data trip card" based on telecommunications big data, by the three operators to provide a unified interface, only to fill in the cell phone number, verification code and confirm my authorization, no need to fill in the ID card number, home address, do not collect other personal information, the operation of the simpler and safer, to fully protect the user's privacy.