To unlock the Polaroid PDM-2737, the procedure is the same as for PDM-2727.
1. Remove DVD disc from unit. 2. Turn on the DVD player. 3. Using the remote control, press the "setup" scroll down to "Preferences"
Note: If there is a disc in the player, you will not see the "Preferences" tab!!!!
4. Enter code number 1379 with the remote, the region changing code menu will appear. Then use the ENTER key of the remote to select another region code. as "0" was not available, I tried "4" and it works fine. 5. press the "SETUP" to save and exit.
Before to change code from 1 to 4, I've tried one disk with region code 4 in the unit and it works perfectly. It seems that the region code is open, so, try to change code only if your disk not work fine...