Instructions

IDUINO for maker’s life
www.openplatform.cc
//fona.hangUp();
}
// we dont really check that the text field makes sense
// just try to call
if (b == 0) {
status(F("Calling"));
Serial.print("Calling "); Serial.print(textfield);
//fona.callPhone(textfield);
}
delay(100); // UI debouncing
}
}
}
*******code End*******
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Reference
https://learn.adafruit.com/arduin-o-phone-arduino-powered-diy-cellphone