listen to calls at the right volume

When you are on a call press to increase the earpiece volume or to decrease the volume.

silence your ring tone

Press and hold at the main display to set your phone to silent mode.

Repeat to deactivate silent mode.

avoid accidental calls

It’s a good idea to lock the keypad to avoid making calls by mistake.

To lock the keys, press and hold the # key.

To unlock the keypad press and hold # again.

2.2

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Siemens C55 manual Listen to calls at the right volume, Silence your ring tone, Avoid accidental calls