Note: For Chinese spammers, the cost of each US mobile phone number is less than 9 cents, but for normal users is dozens to hundreds of times.

Even if other methods of registration are not allowed, other login methods should be provided, such as allowing login with a username or id and password, and prohibiting login when entering a mobile phone number.

The telegram actively claim that civil movements around the world rely on it to defend human rights. For this reason, it should also be considered that certain governments can completely control telecom operators. Just recently, the Hong Kong government announced a mandatory real-name policy for mobile phone cards.