Because 2FA OTPs depend on this number, keeping it current is essential to avoid being locked out.
How to how to change mobile number in e-way bill login: step by step
1
Update on the GST portal
Amend the authorised signatory's mobile in your GST registration (non-core amendment).
2
Verify the change
Complete the OTP verification on the GST portal.
3
Sync to E-Way Bill
The updated number flows to the E-Way Bill system for OTP delivery.
4
Test login
Log in and confirm the OTP now arrives on the new number.
Good to know
Tip
This is an informational walkthrough. Always carry out the actual transaction on ewaybillgst.gov.in, the official government portal.
For the bigger picture, see the Login Guide. You may also want the error guide if something goes wrong, or the FAQ guide for quick answers.
Frequently asked questions
I changed my number but OTP still goes to the old one.
Confirm the GST portal amendment was completed and verified; the E-Way Bill system pulls the number from there.
Can I use a different number just for E-Way Bill?
OTP delivery follows the GST-registered mobile, so update it at the GST portal level.