Input line
When you press the line key against the input lines, the user interface:
Selects the corresponding line for the line which accepts user input.
Displays the cursor after the last character of the existing content if the line is an input line. If you type an entry, the phone performs no action even if the cursor is in the middle of the line.
Performs the action of the first soft key for the line which does not accept user input even if the input line is active.
For example, when you press a line key in Contacts, the interface initiates a call to the contact because the first soft key represents the Call key.