How to stop this alert on Telegram app: * Open Telegram, and tap on the hamburger button, which is located on the top left corner of the screen. * Go to the Settings section and then jump to Notifications and Sounds. * Scroll down and tap on ‘Contact joined Telegram.’
* Open Signal on your Android smartphone and then tap on the three-dotted icon, located on the top right side of the screen. * Got to Settings, go to Notifications. * Now, scroll down and toggle off the ‘Contact joined Signal.’ The steps are similar for the iOS version too. In India it is estimated that the Signal app was downloaded by close to 3 million users. also, this week, Signal became the No. 1 app in India on Apple and Android phones.