To meet your requirements, you'll need a virtual Indian mobile number service that offers call forwarding, SMS forwarding, and voicemail features, with a focus on seamless OTP verification. Here's how we can proceed:
1. **Virtual Mobile Number Service**: Look for a service provider that offers virtual Indian mobile numbers with call forwarding, SMS forwarding, and voicemail capabilities.
2. **Automated OTP Verification**: Ensure the service supports automated voice messages for OTP verification. This feature is critical for providing users with OTPs via phone calls.
3. **Prior Experience and Skills**: Freelancers with experience in developing or integrating similar services, including VoIP services, OTP systems, and automation, will be valuable for this project. Their understanding of Indian telecom regulations will ensure compliance and reliability.
4. **Prompt and Seamless OTP Verification**: Emphasize the importance of prompt and seamless OTP verification.
5. **Payment Structure**: Since you mentioned preferring a pay-per-call basis, confirm with the service provider if they offer such a payment model.
By selecting a service provider with the right features, experience, and understanding of your needs, you can ensure a smooth implementation of the virtual mobile number service for OTP verification. Let me know if you need further assistance in finding the right service provider or freelancer for your project.