How can iTing 4G give away ringtones? Are there any charges?

If you need to activate the ring back tone service, you can use the local self-service text message to do it. Edit and send KH to 10658830 to activate, send text message XH to 10658830 to cancel the ring back tone. Or send 202001 to 10086 to activate, and send 202002 to 10086 to cancel. Month Function fee is 5 yuan/month. Sending text messages is 0.1 yuan/text. Cancellation takes effect immediately, and the fees for this month will be charged as normal. If successful, you will receive a text message notification