Ericsson DIALOG 4223 PROFESSIONAL - MANUAL 2 User Manual page 128

Installation
128
Placing the phone
Do not expose your phone to direct sunlight for long periods. Keep
the phone away from excessive heat and moisture.
Cleaning
Clean your phone only with a soft, water dampened cloth. Using
soap or any other cleaning materials may discolor or damage the
phone.
Dialog 4223 Professional/Dialog 4225 Vision