Android EMI Payment Locker

I need an Android-only locker application that can remotely lock a customer’s phone whenever an EMI payment is missed. The lock itself will be triggered manually from an admin dashboard once my finance team confirms non-payment; there is no need for automated date checks on the device... (Budget: ₹37500 - ₹75000 INR, Jobs: Android, Android App Development, API Development, Mobile App Development, MySQL, PHP, REST API, Web Development)