Wireless Home Phone T2000 comes with the SIM card installed.
Remove the battery cover.
Disconnect the battery cable then remove the battery.
Gently push in on the card, then carefully pull out the SIM card.
If applicable, refer to Insert the SIM Card.
The following image is showing the physical location of the SIM tray and is for informational purpose only.
Connect the battery cable to the socket on the device then insert the battery as shown.