I am trying to download a game from my phone but it keeps giving me an error and it stops in the middle. Please help me.

Did you check if the game is supported on your mobile device? The download in question would need to support android or iphone. Another thing you could check would be if some settings (for example within your play store/ app store) prohibit you from downloading files/apps from external sources.

That being said, I am not even sure if iphone allows you to do that in general. So if you are using that, you may be out of luck. But that is only an assumption from my side.