My memoir phone screen is locked, no buttons will work

Locate the unlocking key on the right hand side of the unit and press it and see if you are able to enter things with the touch screen. If that doesn't help, remove the battery and the SIM while the phone is turned on. Reinstall battery and SIM and turn on the phone, and test to see if it works. If it still doesn't work, you'll have to return the phone to the place of purchase or nearest authorized repair center.