Most people want to know about telegram sign in via mobile then your search is finished here. Read given mentioned steps:
First, download the telegram app for your phone.
After installation of the app, you need to tap on the icon
Top on start messaging
After that tap on OK now allow telegram to receive phone calls to the verification
Then choose your country, enter your country code and mobile number
Then enter your receiving code
Click on login
read also: https://ityug247.hpage.com/how-can-i-login-to-telegram.html
https://myblogtime.com/how-to-log-in-to-telegram-web-on-a-pc-or-mac/