Just to let you know, AirportCityGame will be moving to superfast new servers very soon. This will stop the slow running and downtime you may be experiencing when you visit.
For more information - Please see THIS thread.
Transfer Game to New Device
Provide information on how to transfer your game to a new device.
1) You can contact Game Insight and ask them to do it for you. They will require a variety of details, such as your friend code and old and new device information.
2) You can use a free app from the Google Play store called Helium. This app does not require your devices to be rooted and will simply backup the game to your computer, and then transfer it to your computer to your new device.
3) If both of your devices are rooted, you can make a backup of the game and the data using a program such as Titanium Backup or MyBackUpPro. Once backed up, simply restore onto your new device.