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SmsManager class is responsible for sending SMS from one emulator to another or device. You cannot directly instantiate this class; instead, you call the getDefault() static method to obtain an SmsManager object. You then send the SMS message using the sendTextMessage() method: SmsManagersms = SmsManager.getDefault(); sms.sendTextMessage("5556", null, "Hello from careerRide", null, null); sendTextMessage() method takes five argument. • destinationAddress '' Phone number of the recipient. • scAddress '' Service center address; you can use null also. • text '' Content of the SMS message that you want to send. • sentIntent '' Pending intent to invoke when the message is sent. • deliveryIntent '' Pending intent to invoke when the message has been delivered.