If you want to create a account , you need to provide your phone number. This way, Telegram verifies your identity. However, your phone number is not necessary to use Telegram. Here's how you can hide it.

First of all, you should know that there are two ways to add users to Telegram. First, using their phone numbers or using unique usernames.
If you and your contacts use the system , you can continue to use Telegram (join groups, subscribe to channels, and more) without ever sharing your phone number. To do this, all you have to do is turn off a setting.
Hiding your phone number on Telegram on Android devices

You can hide your phone number on Telegram by changing the setting from the Android app. First, open the Telegram app on Android smartphone and tap the three-line icon from the top left corner.
Select the "Settings" option.
Now, go to the “Privacy and Security” section.
Here, select the "Phone number" option.
In the " Who can see my phone number " section , you'll see that the default option is " Everyone ." If you only want your number to be visible to your contacts , select " My contacts ."
If you don't want to show the phone number to anyone, select the "Nobody" option.
Once you set the option to “Nobody,” you’ll see a new section called “Who can find my phone number.” To be more secure, you should change this setting to “My contacts.”
This ensures that only users in your contact list can search for you on Telegram. No one else can find you or see your phone number. When you're done, tap the check mark icon in the top right corner to save settings .
