For high complexity products, the answer is simply that you can’t and you will not ever be able to without tools that make high complexity products simple. (as an example of such a tool, complex plastic molded parts used to be infeasible to create yourself until 3d printers and easy to use 3d modeling software).
Cars and computer chips and phones are all examples of this. When you ‘build’ a computer it would be similar to if you could buy car modules are easy to bolt together sections and thus lego together whatever you wanted. The “DIY cars” you are thinking of are far inferior in critical ways to their mass produced designs, however. (handling and safety and weight distribution and efficiency and reliability are all far inferior for DIY vehicles). Just like you can hack together something that would functionally act like a phone and computer, even if it’s done by bodging a raspberry pi to a Nokia brick phone and using an acoustic modem for the internet access. It just won’t be very good.
Your best option for your phone needs is to buy a 1-2 year old used example of the high end model that has every feature you need.
For high complexity products, the answer is simply that you can’t and you will not ever be able to without tools that make high complexity products simple. (as an example of such a tool, complex plastic molded parts used to be infeasible to create yourself until 3d printers and easy to use 3d modeling software).
Cars and computer chips and phones are all examples of this. When you ‘build’ a computer it would be similar to if you could buy car modules are easy to bolt together sections and thus lego together whatever you wanted. The “DIY cars” you are thinking of are far inferior in critical ways to their mass produced designs, however. (handling and safety and weight distribution and efficiency and reliability are all far inferior for DIY vehicles). Just like you can hack together something that would functionally act like a phone and computer, even if it’s done by bodging a raspberry pi to a Nokia brick phone and using an acoustic modem for the internet access. It just won’t be very good.
Your best option for your phone needs is to buy a 1-2 year old used example of the high end model that has every feature you need.