iPhone 16 models. Notably, the base Nothing Phone 3a is tipped to be accompanied by a Pro variant as part of the Phone 3a series, with the latter marking a first for the company.
In a Nothing follows the same path as other OEMs, then a single press of the button may activate the camera while pressing it again would snap a photo.
However, fans also speculate that it may have other functionality altogether. One of the theories suggest it could be an alert slider, similar to the one found on devices made by Carl Pei's former company, artificial intelligence (AI) this year and it may be a button for invoking the Nothing Phone 3a's voice assistant.
Other speculation hints towards it being a multi-purpose toggle for several actions, comparable to the iPhone's action button which can be set to perform different functions such as putting the phone on silent mode, activating the flashlight, changing the focus mode, and opening the camera.
However, this is based purely on speculation and its purpose is expected to be revealed in the days leading up to the launch of the Nothing Phone 3a series, which is scheduled for March 4.