package entity

// Carrier is a mainland China mobile network operator used to pick an SMS template.
type Carrier int8

const (
	CarrierUnknown Carrier = 0
	CarrierMobile  Carrier = 1
	CarrierUnicom  Carrier = 2
	CarrierTelecom Carrier = 3
)

func (c Carrier) Valid() bool {
	return c >= CarrierMobile && c <= CarrierTelecom
}