SamyGO

Have not experienced any issues on mine. Try to use ethernet cable. If not then disable auto channels in router and good neighbor policy.

Your best bet is to try https://bugs.tizen.org

1. Firmware code is T-N14MJAKUC. Latest download is 1022, 1025 seems to be newer from factory.
2. Do you use wifi or ethernet cable? Try to connect using cable.

Do not update to latest version you will longer not able to install widgets. You can try to upgrade by USB to 1412 and then you will be able to downgrade just in case.

reza wrote: it would be nicer if u mention what features have been disabled on which upgrade, or what bugs are in specific firmware.

See my compiled list at first page but these are not all changes and there are more that are not noticed.

It was just to inform others

This no more works for firmware versions newer than >1441

You should attach a fast hard drive to your TV.

Did it have this Persian language previously?

Look for 0000 firmware - viewtopic.php?f=87&t=10138