A melody is a good thing or make a phone, which shows an incoming call or text message. The term is a misnomer, since it is often to refer to any ring sound, almost all of which is not signal. The term is often very adaptable to the sounds that are used in mobile phones.
A telephone "rings" when its network indicates incoming calls, and thus alerts the user. For landline telephones, the call signal can be generated by the power switch, which is connected to a phone number. For mobile phones, the network sends the message, the phone call.
