WhatsApp has officially ceased to function on 16 models of older smartphones starting July 1, 2025. This discontinuation affects various devices including models from Apple iPhone, Samsung, and Motorola. Users of these outdated phones will no longer be able to open the WhatsApp application or download it from app stores. The move is part of WhatsApp's ongoing effort to limit the app's use to devices with updated software and capabilities. Lists detailing the specific models impacted have been published by multiple sources, highlighting the importance for users to verify if their device is affected.