We always send OTP on mobile number and email ID. There could be a possibility that OTP may not get landed on mobile number due to any network glitch.
To Pay the Fee through Mobile Apps (Android Phone Only)
Login to the mobile application (Digicampus 2.0) https://play.google.com/store/apps/details?id=in.edu.awesindia.erp
For this Apps OTP is not required