Cell2Jack can be shared with two cellphones.

• Your home phone will ring if there is an incoming call for the one of the cellphones.
• You can use the home phone to make call via one of the cellphone.

To setup pairing for second cellphone:

• Press #*# from your home phone keypad while off hook to start pairing (should hear an acknowledge tone).
• The red LED should start flashing. 
• Press search from your new cell phone then select "cell2jack.." when found it.