I already have Firebase set up in my React Native codebase, yet the phone-auth OTP never reaches the user on either iOS or Android. I need you to jump on a remote session, trace whatever is blocking the SMS dispatch, and leave me with a clean, tested implementation that successfully delivers and verifies the code on both platforms. You’ll be working directly on my machine, so the solution must be reproducible there—no “it works on my computer” surprises. If you’ve untangled similar Firebase Phone Auth issues before, send over a quick note highlighting that past work; that’s all I need to see. Acceptance is simple: trigger OTP, receive OTP, confirm verification—all without breaking existing functionality. We will finalise the amount while we discuss.