Grok 4 Voice to Text Won't work on my Galaxy S25 Ultra no matter how I configure my phone

Just downloaded Grok today on my S25 Ultra. It looks great — clean interface, prominent microphone icon right beside the text box — but the mic doesn’t work.

I’ve tried every fix recommended by Grok and ChatGPT, and still no luck.

I use ChatGPT extensively for researching and drafting briefs and policy papers across a wide range of topics. For that kind of work, voice input isn’t a luxury; it’s essential.

Without reliable voice functionality, I have no real reason to use Grok.