No offence , But that's one of the weirdest questions I've seen here. That's like saying hey I have a small 9.7 inches TV. Can I install iOS on my old TV because its the same size as the iPad.
I'm not even sure if you're serious or not.
Well anyway , the answer is a VERY huge NO.
So what the screen size is the same ? The inside chips are definitely different. The processor, the GPU , the radio..basically everything.
If it was about the screen size companies wouldn't even need to release newer phones.
and I doubt that you'll find a way to actually flash it on your phone. and if you did , your phone will just get bricked.
Please Press The Thanks
button if I helped. It's free. I promise!