Is it possible for telegram bots to obtain the user's phone number after they have started the bot (without explicitly asking the user to input their contact details)?
If so, how do I achieve this using Telegram bot api or any other method?
For privacy reasons, it's absolutely impossible.
These are everything that bot knows about a user:
| Field | Type |
|---|---|
| id | Integer |
| is_bot | Boolean |
| first_name | String |
| last_name | String |
| username | String |
| language_code | String |
| can_join_groups | Boolean |
| can_read_all_group_messages | Boolean |
| supports_inline_queries | Boolean |