GemiGuard Knowledge Base
Knowledge Base
Guides from our own work with Pixel phones and GL.iNet routers: what works, how to set it up, and how to check it.
Pixel with GrapheneOS
Which Pixel to choose, what GrapheneOS changes, and how to use the phone every day.
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Which phones run GrapheneOS, and why only Pixel
GrapheneOS runs on Google Pixel only: every model from the Pixel 6 to the Pixel 10a is supported, the Pixel 8 and later are recommended, and the project’s hardware requirements, from verified boot to a secure element and hardware memory tagging, rule out every other brand. With Google’s support-end date for each model.
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Which operating system a Google Pixel runs, and what GrapheneOS replaces
Every Google Pixel ships with Android: Google’s own build of it. GrapheneOS replaces that build with its own, also based on the Android Open Source Project, on the same hardware. It removes Google’s privileged services from the system.
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GuardDo Pixel: how to verify a secure phone
In September 2026 every check we could run on GuardDo Pixel gave the same result: its security claims come with no evidence a customer can verify. A claim that cannot be checked has to be taken on trust. Owners of EncroChat, Sky ECC and ANOM phones took the same kind of promise on trust.
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The IMEI on a Google Pixel: where it is stored and what changing it takes
Where the IMEI physically lives on a Tensor Pixel, the three layers that hold it in place, why it is an integrity check inside signed modem firmware rather than a hardware fuse, what IMEI spoofing modules actually change, and why none of it buys anonymity on a cellular network.
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VPN on a GrapheneOS Pixel: why an app on the handset does not cover all traffic
Enforcement in Android applies to application identifiers, and system identifiers are exempt from it at the level of the networking subsystem. Which categories Google confirms are outside the tunnel, why tethered traffic never enters it, where DNS leaks come from, and the one configuration — cellular off, Wi-Fi only, tunnel on the router — that leaks nothing.
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Banking apps, Diia and Reserv+ on GrapheneOS: what works on a Pixel in Ukraine
Privat24, monobank, Oschad, Sense SuperApp, MyRaif and KredoBank work with sandboxed Google Play. Reserv+ works even without Google services. Diia works under two conditions. Binance works. The NFC chip works, while tap-to-pay through Google Wallet and Google Pay is unavailable, because Google permits it only on operating systems it has certified itself.
GL.iNet routers and VPN
Setting up GL.iNet routers, VPN protocols, and privacy on the mobile network.
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High-security VPN routers for use with Starlink terminals
Comparing the GL.iNet Slate AX and Flint 3 for working with Starlink. Technical specifications, WAN integration, the advantages of OpenWrt over the standard Starlink router. Choosing the right model for mobile and fixed scenarios.
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WireGuard and OpenVPN — a VPN protocol comparison
How OpenVPN and WireGuard work: the two VPN protocols GL.iNet routers support. OpenVPN is the time-tested standard. WireGuard is a modern approach built on ChaCha20. Compatibility with ProtonVPN, NordVPN, Mullvad. Configuration via the web panel or the app.
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Mudi V2 — a quick setup guide (GL.iNet GL-E750V2)
Seven steps from unboxing to a working VPN router: charging, inserting the SIM, powering on, connecting to Wi-Fi, signing in to the admin panel, automatic configuration. Notes on Kyivstar, Lifecell and Vodafone.
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Tailscale on GL.iNet routers — the complete guide
What Tailscale is and how a WireGuard-based mesh VPN works. A comparison with VPN, Tor and Cloudflare WARP, use cases, setup, and a table of GL.iNet routers that support Tailscale — with a link to every model.
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IMEI obfuscation on the GL.iNet Mudi GL-E750V2 VPN router
A detailed breakdown: what IMEI is, how it is tied to the modem chip, when it is transmitted to the cellular network, and why IMEI obfuscation is an important counter-surveillance strategy. Benefits, risks and key considerations.
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GPS and location telemetry in the GL.iNet Mudi GL-E750V2 and Puli GL-XE300
The Mudi V2 and Puli cannot transmit the user’s GPS coordinates. The hardware configuration, the GPS status in GL.iNet firmware, and how to verify it yourself via AT commands. Context on cell-tower triangulation.
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Rivian in Ukraine — OTA updates via a US-IP VPN
Rivian does not send OTA updates outside the US and Canada, and the built-in eSIM is dead outside North America. A GL.iNet Puli holding a permanent US-exit tunnel restores updates, the mobile app and remote diagnostics. It does not restore maps or live traffic while driving. The package: a Puli, a prepaid Kyivstar SIM and a US IP address.
Other articles
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How to make your woman happy: a scientific 24-step guide
A satirical guide from the International Institute of Domestic Harmony: why a vacuum cleaner is not a gift, how to covertly learn her size, why you should buy in sets, and where stable Wi-Fi comes in. In partnership with TSODS.
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