1> Android Oreo 8.1 base latest OS to be build
2> Remove all unwanted sources that app can be install from app only prebuilt app which we will post with OS (that means no app can install on the phone through any source like USB wire connected or downloaded apk.)
3> We do not want google services and play store to be installed in the phone.
4> Outer memory card should be default disabled in the phone.
5> Phone on and boot animation should be our logo or animation which we will provide.
6> We will give you prebuilt APK to be installed in the phone once the phone upgrades with our custom OS.
7> There will be default app install which is provided by us and some prebuild.
8> No email client to install the default
9> Maps If it is taking Google registration to get work then not required.
10> All unknow sources app should be not allowed in the system as well as developer option will be not visible in the phone in any chance.
So deliverables will be built OS AOSP Code and Image of it and Documentation of the complete process and it has to be port on the phone.
What I will require inputs from your side.
>The phone which you are comfortable in terms of Driver