Google confirmed on 2026-05-17 that a major update containing new Android features is rolling out to millions of phones this week. ^[1] Android devices running version 9 or newer include a built-in feature called Private DNS that can block ads without requiring the installation of third-party applications or rooting the device. ^[2] On-device mobile Large Language Model (LLM) inference systems face performance degradation when users switch between applications, causing the operating system to evict LLM memory such as model weights and KV cache. ^[3] Google is intentionally omitting a major AI tool from the current Android update despite the rollout of other new features. ^[4] The Private DNS feature functions by identifying known domains used for ad delivery and preventing the device from connecting to them, which stops ads from loading in apps, games, and websites. ^[5] To activate the ad-blocking capability, users must navigate to network settings and manually enter the DNS address 'dns.adguard-dns.com' instead of using the automatic configuration. ^[6] mzCache elastically evicts LLM memory and leverages the unified memory of mobile System-on-Chips (SoCs) to enable zero-wait inference on the GPU with concurrent CPU-side restoration. ^[7] The authors present mzCache, an on-device LLM inference system designed with specialized memory management for multitasking environments. ^[8] When LLM memory is evicted, the inference system must either restore the data through slow storage reads or recompute the entire KV cache, which severely degrades responsiveness. ^[9] Google is being quiet about the specific AI tool that is missing from the update. ^[10] The article reports that for the average Android user, this is one of the simplest methods to reduce ad numbers without using additional apps, VPNs, or complex configurations. ^[11]