My name is Xavi. I am a hardware communications technician. I run Link'd Communications out of the Coachella Valley, where I program and secure encrypted two-way radio fleets (Motorola, Kenwood, Icom) for commercial operations. In the radio world, security isn't just about software; it is about physical signal integrity and hardware custody. I know exactly how signals work, and how they are intercepted.
I cross the Mexico–United States border regularly. For years, I have been stopped, profiled, and targeted. When border agents or the military see a young man with brown skin, tattoos, and a truck full of high-end radio programming gear, they don't see an engineer. They assume malandro. They assume cartel comms. They assume I have something to hide. And every time, it comes down to the same demand: "Let me check your phone."
If you refuse? It goes bad. They escalate. They threaten. They make it clear that "no" is not really an option. So you hand it over — and they take it to a back room, out of sight, where you have no idea what they are doing.
Most people think a screen lock is enough. It is not. Law enforcement tools bypass PINs, clone storage, and install persistent modules that survive reboots. You need a system designed to block this at every layer.
Privacy should be respected. I do not support illegal activity of any kind. But I also do not believe that looking a certain way gives anyone the right to strip you naked digitally. This app is my answer to that.
I needed to know Sentinel worked in the real world — not in a lab, not on an emulator, but in the hands of people who would actually try to break it.
Sentinel is not just an app to me. It is the difference between walking into a checkpoint naked and walking in armored. It is the difference between handing over your phone in fear and handing it over with confidence — because you know they cannot crack it, cannot install on it, and cannot hide what they try.
I do not sell this to make money. I sell it because I needed it, and I know other people need it too. Journalists. Lawyers. Activists. Regular people who happen to look like me, who get stopped because of how they dress, how they speak, or the color of their skin.
If you cross borders, if you work in sensitive spaces, if you have ever had someone demand your phone like it belongs to them — this is built for you. Not for everyone. For the ones who know why it matters.