Calling services refer to telecommunications options that allow individuals to make voice calls over various networks. These services can be provided through traditional landlines, mobile phones, or internet-based platforms like Voice over Internet Protocol (VoIP) systems. Users can connect with others locally or internationally, often with different pricing structures based on distance and technology used. Many calling services also offer additional features such as call waiting, voicemail, and conference calling. With the rise of smartphones, applications like WhatsApp and Skype have become popular alternatives, enabling users to make calls using their internet connection, often at lower costs than traditional methods.