PayEcho reads payment notifications and speaks the amount. If notifications are delayed or blocked, the soundbox goes quiet — even when UPI money arrived.
Open PayEcho and allow notification access (or Notification listener). Without it, the app cannot see GPay / PhonePe / Paytm payment toasts.
Some phones route TTS (spoken voice) through media volume. Keep media volume high during shop hours.
Recent-apps “lock” can help on aggressive OEMs. Avoid Force Stop from settings.
Send yourself ₹1 via UPI while packing a bag. You should hear the amount. If not, re-check permission and battery.