Is it possible to change Internet tv region in bd-c5900?

[cmelloni]

To change your internet tv country code follow the instructions from the post below:
viewtopic.php?f=12&t=1757&hilit=country+code#p15319

Make sure you have a backup of your current widgets before you change the country code.

Keep in mind that some applications check the actual location based on your IP address before delivering the content to the TV and/or Blu-ray. In some cases you will need to have a DNS server address based in the same country of the content you want to receive (in your case Poland). Try to find services like UnblockUs in Poland.