I have never understood the N70 problem, and I can't help it.

1, you don't have settings, you can set them in Tonghua settings, or you can directly install incoming calls, which is fully functional.

2. Call waiting needs to be enabled. If it is not enabled, it will naturally not work. You are in Tonghua, and you want to know who someone called just now. You can open a short message service, and one month 1 yuan can satisfy the need to know who called you when you turned off your phone.

3, and 1 are the same meaning, but the setting is not good.