How to open the directional roaming of mobile phone card?

Business acceptance and cancellation methods:

Through e 100 SMS business hall:

Send KTDXMY+ equivalent area code to 10086. (for example, KTDXMY04 1 1, that is, the directional roaming discount to Dalian is opened).

Send BGDXMY+ peer area code to 10086 to make changes.

Send QXDXMY+ peer area code to 10086 to cancel.

Roaming refers to the function that a mobile communication system can still provide services to mobile stations after leaving its registered service area and moving to another service area.

Just like a mobile phone, it can roam between different base stations, and wireless network workstations can roam between different APS. As long as the ESSID definitions of AP groups are the same, natural wireless network workstations can roam freely in the area covered by radio waves.

Roaming is a term commonly used by mobile phone users. It means that users of cellular mobile phones can continue to use their mobile phones in other regions or countries when they leave their own regions or countries.

Roaming can only be carried out between domestic cities with compatible network standards and connected networks or between regions or countries that have signed bilateral roaming agreements. It is technically quite complicated to realize roaming function. First of all, the location of users should be recorded, and there should be a set of profit settlement methods between operating companies.