Telephone / Mobile Services
| Name | Telephone Number |
| Telephone Enquiry | |
| Delhi | 197 |
| Faridabad | 951235281001 |
| Noida | 951204511000 |
| Gaziabad | 951204711115 |
| Local Assistance | 199 |
| Fault Repair | Exchange code+2198 |
| Computerised No. Check | |
| English | 1952 |
| Hindi | 1951 |
| Trunk Booking (National) | 180 |
| Booking (International) | 186 |
| Complaints | 198 |
| Billing Enquiry & Complaints | 1662 |
| Morning Alarm | 116+Time |
| Mobile Services(Customer Care) | |
| Airtel | 98100 12345 |
| Essar | 98110 98110; 98110 98202 |
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