From now on, you can choose a public username in the Settings section of Telegram. If you do, anyone will be able to find you by your username and contact you without having to know your phone number. To find people by username, just start typing any name in the search field of the Contacts section.
How can I search a number in Telegram?
To find people by username, just start typing any name in the search field of the Contacts section. Once entered at least 5 characters, you will see the Global Search section in your search results. This list contains people with corresponding usernames.