1. The Solid dots indicates signal strength by the number of one to five dots.
   Note: The signal strength and data connection information are displayed in the top left corner of iPhone.
   
2. The Airplane icon indicates Airplane Mode is active, and there is no network connection.
   
3. Data Attachment
   
   * GPRS = Connected to AT&T's wireless GPRS data network.
   * E = Connected to AT&T's wireless EDGE data network.
   * 3G = Connected to AT&T's mobile broadband network.
   * 4G = Connected to AT&T's 4G HSPA+ mobile broadband network.
   * LTE = Connected to AT&T's 4G LTE mobile broadband network.
   * Wi-Fi icon = Connected to a Wi-Fi network.