Run a Local LLM on Your Android Phone with llama.cpp and Vulkan

This week r/LocalLLaMA lit up over a single screenshot: a quantized 7B model generating text at double-digit tokens per second on a mid-range Android phone, with the GPU doing the heavy lifting through Vulkan and no root access anywhere in sight. The thread blew past everything else on the subreddit because it cracks a problem people assumed needed a Snapdragon flagship or a custom ROM: real on-device inference on hardware you already own.