Transfer Clash of Clans from old iOS devices to a new one
Download then install iExplore on your computer or Mac. Connect your old iOS device to your computer. On iExplore window, browse to /private/var/mobile/Application then copy the Clash of Clans folder to your computer. Disconnect your old iOS device then connect the destination device to your computer. On iExplore window, Paste the Clash of Clans which have been saved on your computer to /private/var/mobile/Application folder of the new device Note: If your new device is running iOS 8, you have to paste it to/var/mobile/Containers/Bundle/Containers.
Open Game Center on new device then log in with associated account which you use on your old device. It will ask you to confirm to replace the new Clash of Clans account. Just press CONFIRM.
Enjoy!