1) make sure the correct phone loads are on the system
2) set switch port to
3)Hold down the # key on the phone, when powering up the phone
4) wait for the MWI light on the handset to start flashing.
5) Once the MWI light is flashing, release the # key and enter the following sequence:
the MWI light will flicker and the phone will turn off, give it 10-15 mins and it will start upgrading and then it will work 🙂