Samsung SM-S975LZKATFN - Manual (Page 41)

Shows your current battery only has up to 4%
power remaining and will soon shutdown.
(Charge: ~4% - 1%).
Displays when your device is communicating with
the EDGE network.
Displays when your phone is communicating with
the 3G network. 3G indicator is only seen when
roaming.
Displays when your phone is communicating with
the HSPA+ network.
Displays when your phone is communicating
with the 4G LTE network.
Displays when the phone has detected an active
USB connection and is in a USB Debugging mode.
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 in the notifications window when there
is a new Email message.
Understanding Your Device 34