The battery icon shows the remaining battery power. The bigger the coloured section of the icon, the more power.
Further information:
Charge the battery

The battery charging icon shows the battery is charging.
Further information:
Charge the battery

The signal strength icon shows the strength of the network signal at your location. The more lines, the stronger the signal.
Further information:
Select network

The flight mode icon shows flight mode is turned on.
Further information:
Turn flight mode on or off

The 3G icon shows 3G is available. If 3G isn't available, a different network mode is automatically selected.
Further information:
Select network mode

The divert icon shows all incoming voice calls are diverted.
Further information:
Divert calls to voicemail
Divert calls to another number

The missed calls icon shows you've one or more missed calls.
Further information:
Make a call
Answer a call

The SMS/MMS icon shows you've received a new SMS or MMS.
Further information:
Read SMS
Read MMS

The email icon shows you've received a new email.
Further information:
Read email

The silent mode icon shows that silent mode is turned on and all phone sounds are turned off.
Further information:
Turn silent mode on or off

The alarm icon shows the alarm is set.
Further information:
Set the alarm

The active data connection icon shows a data connection is active.
Further information:
Use internet browser

The Bluetooth icon shows Bluetooth is active.
Further information:
Turn Bluetooth on or off

The Wi-Fi icon shows that your mobile phone is connected to a Wi-Fi network.
Further information:
Connect to Wi-Fi network