How to make gta san andreas work for iphone 4? - 1

I accidentally bought it how can i get it to work i can't afford another phone

If your phone is not on the approved list, it does not have the guts to run the game.
There's no way to improve or upgrade a mobile phone.

Can't. If it wasn't made to run on it then there's nothing you could do.

You could try to get a refund if it was indeed an accidental purchase.