4G Communication Smartwatch Hardware Design

I want to bring a new smartwatch to life whose core job is keeping users connected. The watch must handle 4G LTE data, Wi-Fi and Bluetooth without compromise, then manage power efficiently so real-world battery life feels practical, not theoretical.

The focus is communication and notifications, so the hardware and firmware have to support:

• Voice calls
• Text messaging

Both Android and iOS users should be able to pair, place or receive calls, and read messages seamlessly.

My expectation is that you will design the electronics (schematics, PCB, antenna layout), choose components that meet worldwide 4G bands, integrate a robust battery management system, and supply the low-level firmware that drives the modem, BLE stack and power states. If you can also oversee enclosure engineering or early prototyping, let me know—that’s a plus.

Please outline your experience with cellular IoT modules, smartwatch or wearable PCB design, and any shipped products that prove you can balance RF performance with tight power budgets. I am ready to move quickly once I see a clear plan, timeline and the milestones you suggest for schematic, layout, firmware bring-up and test units.