In 2015, Telegram introduced its voice call feature, allowing users to make voice calls over the internet. The company also expanded its services to include channels, which allowed users to broadcast messages to large audiences.
The initial development of Telegram began in 2013, with a team of developers working on the project. The app was designed to be a simple, fast, and secure messaging platform that would offer end-to-end encryption. rwayat blwmy tylyjram
I'm assuming you meant "Develop a full report on the history of Telegram". In 2015, Telegram introduced its voice call feature,