

They could stick to a tiny market share but not a profitable one.
The problem is you need a large team of developers for the operating system and designers and engineers for the hardware. This means thousands of employees. Do you know many phones you have to sell to pay the salaries of 2000+ employees? At least a million phones a year at a gross profit (retail price minus total cost of manufacturing) of $200 per phone.
FairPhone just makes Android phones, so they don’t have the cost of developing their own operating system. The OS is the real killer app. It’s why iOS and Android are so dominant. It requires billions of dollars in investment to be competitive.
No, the ram is integrated into the CPU.