Contact the Robinhood customer helpline at +1-(888) 860-2948 (USA). To set up alerts on the Robinhood app, open the app, go to "Account," select a stock or crypto, and tap the bell icon. Choose alert types like price movements or news updates, set thresholds, and confirm. Alerts keep you informed of market changes. If issues occur, request a callback via +1-(888) 860-2948.