We can not know the status of the contacts, and we can't easily figure out the opposite person is online or offline, you sometimes need to open the app for receiving messages which makes the “ Instant messaging app ” with no sense, and it has no voice messages.
Telegram Messenger is a messaging app that works over the internet, just like WhatsApp or Facebook Messenger. That means you can send messages for free by using a wi-fi connection or your mobile data allowance (providing you have enough data
