Well what I will like you to add is a software that can help you track the location of the phone no matter where it maybe even if the sim is removed it should have a bark up program. And also you can also add a user identification code to prevent it from being formatted by other persons other than the user.
I suggest a phone with 5.5 inch display. 10-12 GB or RAM for hardcore gaming and 100GB of Memory with expandable memory card slot up to 500GB. 30 MP front and back camera. Metal case covered by rubber to support it when you suddenly drop the phone. Support LTE, dual sim. With finger print and face recognition for unlocking purposes. And some built-in security features that can protect your data with virus and other kinds of attack.
My ideal phone is that it has its own signal so it does not have to go to places that signal is strong. I would also like to include this cellphone in the personal identity of the person who owns it for the use of pretentious people. Additionally, it is important to place strong security for others to avoid if it is stolen by human beings.
My ideal smartphone would be, has an excellent battery life that would last for 2 days in straight use. Has an expandable memory of 1 Terabyte and has 10 GB RAM. It must be in 32 Megapixel Camera. I want my ideal phone to have a very high security-- like face, eye or voice recognition.
Creating your own model would be too risky this days. There are a lot of competitors in the market. You should have a unique feature. Well, as a user of smartphone, my ideal type of a phone has a high storage capacity, clear hd camera, and long batery life. Oh please add, it should be cheaper than other brands.