My thought is: what would it take to produce a hardware with the following features: 1. Should be able to make and receive phones 2. Should be able to send/re

My thought is: what would it take to produce a hardware with the following features: 1. Should be able to make and receive phones 2. Should be able to send/receive SMS 3. Should be able connect to the data plan (4G) 4. Wifi Support 5. Should be able to function as a hotspot so that you can use a laptop for more complex work 6. Should have a basic colour touch screen - need not be very high resolution, but sufficient for a basic UI. 7. Hardware or software keyboard 8. Support for SD cards 9. Headphone jack 10. Micro USB port or USB type c port for charging and data 11. Optional: A camera module for photos/videos if possible 12. Optional: Bluetooth LE 13. Software: 13.1 - Ability to install applications using a root/admin login (similar to any desktop os). The application may be downloaded off the web or obtained from an SD card etc. May be installed into a specific directory which can be backed up or restored. Example: "/usr/apps" 13.2 - Directory for contacts to be stored. Example: "/usr/contacts" with open format for contacts which can be read by apps 13.3 - Directory for photos and videos to be stored. Example: "/usr/media/photos", "/usr/media/videos" 13.4 - Ability to save / load contacts from disk or network 13.5 - Ability to run network servers - example: Samba server or even a basic HTTP server for sharing and receiving files.