Samsung Galaxy Note II User Manual page 34

Shows your current battery only has up to 4%
power remaining and will soon shutdown.
(Charge: ~4% - 1%).
Displays when connected to the EDGE network.
Displays when your device is communicating
with the EDGE network.
Displays when connected to the 3G network.
3G indicator is only seen when roaming.
Displays when your device is communicating
with the 3G network. 3G indicator is only seen
when roaming.
Displays when connected to the HSPA+ network.
Displays when your device is communicating
with the HSPA+ network.
Displays when your device is communicating
with the 4G LTE network.
Displays when the phone has detected an active
USB connection and is in a USB Debugging mode.
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Displays when there is a new text message.
Displays when an outgoing text message has
failed to be delivered.
Displays when an incoming text message
content has failed to be downloaded.
Displays when there is a new voicemail message.
Displays when there is a new visual voicemail
message.
Displays in the notifications window when there
is a new Email message.
Displays in the notifications window when there
is a new Gmail message.
Displays when a new Google+ notification has
been received.
Displays when Hangout updates are available for
download.