SMS Collect Call
This is a collect call service app using SMS message service.
If you install the app on your smart phone, You can use a collect call service easily as if to use a plain call service.
The app uses 1 SMS message per outgoing collect call.
ideas and patents
Smart Call Reminder
This is a call and message reminder.
When a call comes in and you don't answer it, reminder will be activated.
When a SMS or MMS message comes in and you don't read it, reminder will be activated.