CMF by Nothing has begun a phased rollout of its Nothing OS 4.0 update in India for the CMF Phone 1 and CMF Phone 2 Pro. Built on Android 16, the update introduces a cleaner interface with refreshed icons and a simplified Quick Settings layout. Key features include an enhanced Extra Dark Mode, new widget sizes for greater customization, improved multitasking with floating apps, and a hidden apps feature. The rollout is prioritizing Phone 1 users, with Phone 2 Pro expected to receive the update in early January.