Using the Android app FlatrateBooster makes international calls from your mobile very easy. FlatrateBooster is automatically activated when an international call is placed. You do not need to call the dial-in number any longer. You just dial your contacts from your telephone book.
FlatrateBooster on the Android market:
https://market.android.com/details?id=com.flatratebooster.tel
A version for iPhone will be coming soon.
Visit our website for more information www.flatratebooster.com.