Provides APIs for monitoring the basic phone information, such as the network type and connection state, plus utilities for manipulating phone number strings.
| CellLocation | Abstract class that represents the location of the device. |
| NeighboringCellInfo | Represents the neighboring cell information, including Received Signal Strength and Cell ID location. |
| PhoneNumberFormattingTextWatcher | Watches a TextView and if a phone number is entered will format it using
formatNumber(Editable, int). |
| PhoneNumberUtils | Various utilities for dealing with phone number strings. |
| PhoneStateListener | A listener class for monitoring changes in specific telephony states on the device, including service state, signal strength, message waiting indicator (voicemail), and others. |
| ServiceState | Contains phone state and service related information. |
| SignalStrength | Contains phone signal strength related information. |
| SmsManager | Manages SMS operations such as sending data, text, and pdu SMS messages. |
| SmsMessage | A Short Message Service message. |
| SmsMessage.SubmitPdu | |
| TelephonyManager | Provides access to information about the telephony services on the device. |
| SmsMessage.MessageClass | SMS Class enumeration. |
