I am the mobile phone number of Tangshan, Hebei. What should I do to do domestic roaming business? Use SMS, because I can't go to the business hall in other places.

Generally, the mobile phone has been enabled for domestic roaming, and it can be used normally when going directly to other places. However, if you want to apply for a discount, you can apply by SMS to distinguish between roaming in the province and roaming in China. There are 5 yuan roaming discounts in the province, which are commonly used when roaming in the province for 50 minutes including 5 yuan. The handling method is to send HBMY to 10086 for opening. There is a 7-day discount for domestic roaming and 7 days for 3 yuan. If it expires, you can continue to send short messages to customize it after it expires. The processing method can be handled by sending MY7 to 10086.