Just to let you know, AirportCityGame will be moving to superfast new servers on Friday afternoon. This will stop the slow running and downtime you may be experiencing when you visit.
For more information - Please see THIS thread.
How can I earn more coins?
- collect profits from flights;
- collect profits from residential and commercial buildings in your Airport and at your neighbour cities;
- redeem friend codes (each friend code gives 100 coins and you can redeem up to 5 codes a day). You can find friend codes on our official page on Facebook: http://www.facebook.com/AirportCityOfficialPage;
- redeem gift codes published on Facebook (the link above) and on Twitter: https://twitter.com/gi_mobile;
- publish your friend code on Facebook and get a bonus each time your code is redeemed;
- buy coins in the Bank.