What you could build

A micro-SaaS for SME audio branding — Indian small businesses pay to create branded ringtones, IVR hold music, and audiologos for phone systems. Most shops still use default ringback tones; there's real friction to being recognizable when someone calls. Or: An AI voice agent platform called Ringtone — where businesses deploy voice agents that call leads, confirm appointments, and follow up via regular phone calls. No app install, no internet needed on the customer side, just a phone call. Much harder to ignore than an app notification.