1. No matter what company, you know the best principle. If you don't know how to rely entirely on outsiders, your company is likely to experience many setbacks. Remember, if you are an amateur, you will never lead an expert. But you don't need to be an expert. You should know the most basic common sense and master it.
2. How much are you going to invest to outsource everything?
There are many entry points for mobile phones, which require careful business planning. You really need to know too much, not just a few words here.
4. The motherboard can be designed by itself, but the overall research and development cost is high and not simple.
Many large internet companies are making mobile phones in order to compete for mobile internet access, but this does not mean that mobile phones can make more money. To put it bluntly, it is like a newspaper. Buying a newspaper may not make you recover the cost, but you can charge it through advertising. So if you choose this line of work, you must be very cautious. You need too much money.