Create IOT device in the size of cellphone, 4g, 5g cellular and 20 days battery life -- 2

I am looking to have an IOT device created that is no bigger than a cellular phone. The primary purpose of this device will be for security purposes, so it needs to be secure and reliable. 4G, LTE and 5G cellular connectivity is required for the device for full GPS tracking, along with a battery capable of powering the device for up to 20 days. I'm looking for a freelancer who can help me create this device as soon as possible(in 2 -3 weeks may be). If you are experienced and have the skills to meet my specifications, please apply for this job.
This should securely connect AWS IOT core MQTT broker.

Need hardware, firmware and secure connect.

IOT features needed:
1. Full detailed GPS tracking
2. Thermocouple connectivity with Internal and external temperature
3. Tilt
4. Humidly
6. Battery Level should last 20 days minimum.
7 Pressure
8. Size should be like cellphone size including battery.
9. Device should have certificate and securely bootstrap it.
10. During GPS location it needs to be accurate to the feet.

Hardware should be cheap and be approximately $25. If more needed let me know why?

The firmware programming shall be flexible to make future config and enhancements.
The hardware should be modifiable for future changes. The IOT devices shall be on boarded with certificate and also securely without flashing the device.


Thanks