Multi-Carrier Prepaid Recharge System

I want to build a streamlined prepaid phone-recharge service that lets customers top-up numbers from several carriers in one place. The core requirement is support for multiple networks right out of the gate rather than locking the flow to a single operator... (Budget: ₹750 - ₹1250 INR, Jobs: API, HTML, Mobile App Development, MySQL, Payment Gateway Integration, PHP, Web Development, Website Design)