Change The Volume; Access Codes - Nokia Lumia 900 User Manual

Do not connect products that create an output signal, as this may damage the device.
Do not connect any voltage source to the audio connector. If you connect an external
device or headset, other than those approved by Nokia for use with this device, to
the audio connector, pay special attention to volume levels.

Change the volume

Press the volume keys up or down.
The volume keys control all sounds, including the volume of alarms and reminders.
The built-in loudspeaker allows you to speak and listen from a short distance without
having to hold the phone to your ear.
Switch the loudspeaker on or off during a call
Select or .

Access codes

PIN or PIN2 code
(4-8 digits)
PUK or PUK2 code
These protect your SIM card against unauthorized use or are
required to access some features.
You can set your phone to ask for the PIN code when you switch
it on.
If not supplied with your SIM card or you forget the codes,
contact your service provider.
If you type in the code incorrectly three times in a row, you
need to unblock the code with the PUK or PUK2 code.
These are required to unblock a PIN or PIN2 code.
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