Get a complete 2025 guide to HDFC FASTag . Learn how to apply online or offline, complete KYC, activate and link your FASTag , check balance, recharge via UPI or PayZapp, and contact HDFC FASTag customer care . Enjoy seamless, cashless toll payments nationwide. Get in touch with HDFC Bank Customer Care / Complaint Centre for any Queries, Emergencies, Feedback or Complaints Online. We are here to help you 24"7 with our online Customer Care Services! We would like to show you a description here but the site won’t allow us. Call customer care : You can check your FASTag balance by giving a missed call on +91-720-805-3999 toll-free customer care number 1800-120-1243 to enquire about your FASTag balance .