4G/5G Router Code Service Provider

I am looking for a reliable service provider offering authorized code-based services for eligible modern 4G and 5G routers and CPE devices.

Requirements:

* Support for eligible/current router models.
* Valid service result for each eligible device.
* Target cost: around $15 per successful request.
* Processing within 24 hours.
* Replacement or credit for unsuccessful requests.
* Code-based service only; no firmware modification, flashing, or patched firmware.
* API, server panel, or reseller access is preferred.
* Clear pricing and service terms.
* Long-term cooperation with regular and ongoing orders after successful testing.

The service must be legitimately authorized for the supported devices.

Please provide supported models, pricing, processing time, and available service/API options through Freelancer messages.