It’s starting to look like kali-nethunter is supporting more devices:

https://github.com/offensive-security/kali-nethunter/wiki#10-supported-devices-and-roms

It looks like they’ve also released a python script that will build a flashable Nethunter zip file to put on your phone:

https://github.com/offensive-security/kali-nethunter/wiki/Building-Nethunter