Samsung is giving Galaxy owners a real choice in which AI runs their phone. The company will add Perplexity as a second system-level agent on upcoming flagship devices, complete with its own “Hey Plex” wake word and side button controls. The move expands what Samsung calls a “multi-agent ecosystem” inside Galaxy AI. Instead of forcing everyone into one assistant, the company wants users to pick the AI that fits each task. Perplexity is the first confirmed partner, though Samsung hints more could follow. You’ll soon launch Perplexity just by talking to your phone. The agent responds to “Hey Plex,” making it feel as native as Bixby or Google Assistant. There’s a hardware shortcut too. Press and hold the side button, and Perplexity pops up for quick access. This isn’t another downloaded app. Samsung builds Perplexity directly into the Galaxy OS so it works in the background and moves seamlessly between tasks. The company calls this a “system-level” approach.…