https://nalar.dev/tags/android/ Recent content in Android on Nalar Hugo en-us Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/android-priority-notifications-are-not-vip-channels/ Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/android-priority-notifications-are-not-vip-channels/ <h1 id="android-priority-notifications-are-not-vip-channels">Android Priority Notifications Are Not VIP Channels</h1> <p>A pager-style Android application can expose a button labeled <strong>VIP channel</strong>, but Android does not turn that label into a private radio frequency, reserved cellular bearer, or guaranteed delivery path.</p> <p>What the application can build is a priority policy. A server can classify an event as urgent, request high-priority delivery from Firebase Cloud Messaging (FCM), and post the resulting notification to an Android notification channel with high importance. Those controls operate at different layers, and none of them alone provides pager-like delivery guarantees.</p> https://nalar.dev/grapheneos-security-boundaries-android-hardening-baseband-and-imei/ Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/grapheneos-security-boundaries-android-hardening-baseband-and-imei/ <p>GrapheneOS can change how Android isolates applications, how privileged services are exposed, how the operating system is verified at boot, and how much authority Google Play receives. It cannot turn every property of a phone into an operating-system setting.</p> <p>IMEI is a useful example of that boundary. GrapheneOS explicitly states that changing the IMEI is not possible on a production device and that the operating system cannot add support for it because the hardware does not support that operation. The distinction is architectural: Android controls a large software stack, but the cellular modem and device identity mechanisms are not ordinary application data stored inside the Android user space.</p>