Send message to phone number not @username using Telegram Bot

Question

Is this possible to send message to phone number not @username using telegram bot?

If answer is No, I have to say I have telegram account without @username and several days ago I got message from a Bot, how this is possible?

Any advice will be helpful.

Answer 1

its not possible send message to phone number or username. you can only send message by ID.

i almost try every thing.(group chat or channel) the only way, bot can send a message to the user is the user start the conversation.