INSTALLATION
80
BusinessPhone 250 / BusinessPhone 50
Portable DT400 / DT410 / DT420 / DT430
SIM CARD All your personal settings in the handset are programmed
and stored in the Subscriber Identity Module (SIM) card.
The SIM card provides you with personal mobility as you
can easily move it to another portable telephone, enabling
you to receive calls, make calls and keep all your personal
settings such as phone book, identity and alert signal.
Changing the
SIM Card
Note: Change the SIM Card only in an environment without
static electricity.
Remove the battery
See section “Removing and fitting the battery”. The SIM card
is placed under the battery unit in a hatch in the middle.
Move the steel plate forward to open the hatch
You see the labels “OPEN” and “LOCK” on the steel plate.
Push the steel plate carefully in one of the directions.
Lift the hatch and remove the SIM card
Now you can place it in another portable.
Press the hatch and move the steel plate
forward to lock
Fit the battery
See section “Removing and fitting the battery”.
SIM Card
Hatch with
steel plate
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