WhatsApp is introducing a feature that lets users reserve usernames, according to TechCrunch. The reporting indicates that reserved usernames must meet a character-length requirement. One TechCrunch update states that usernames can be between 3 and 40 characters, while another specifies a 3 to 35 character range. Both sources describe the same core change: WhatsApp enables users to claim or hold a username ahead of later use. The articles do not describe additional eligibility rules or the duration of reservations in the provided excerpts, nor do they compare the feature’s availability across devices or regions. The feature is presented as an adjustment to how WhatsApp handles usernames, aiming to give users a way to secure a handle before it is taken by others. The character-length limit is the only detailed parameter that differs between the two TechCrunch items, with the upper limit appearing as either 40 or 35 characters.