I ordered a Xenta DV1013 from amazon as it was advertised as a cheep multi region player how ever when I plug it it to watch a region 1 anime all I got was “Wrong Region” hump what crap I thought but couldn’t be bothered to return it as it matched the rest of my setup.
Well after a bit off googleing I found this guide on the ebuyer forum:
1. Power on the DVD Player
2. Press ‘Setup’ on the remote
3. Enter ‘9735’ on the keypad
4. On top right of the screen a number should appear 0-6
5. Select number you want for Region Coding (0 being no region so will play all films)
6. Press ‘OK’ on remote, then ‘Setup’ to close menu
7. Every Region of DVD should now play on the DVD Player.
Tryed it and the instructions work. Just need to borrow a dvd to test it.
Apart from that is supposed to be a nifty little device. I suppose Ill do a full test when dvds work.
Ajb2k3's Weblog 
Hi, I’ve just bought a Xenta DV1013 player as well, and had read up about this handy little trick to make this player a regionless one (I like to buy some DVDs from abroad…).
Anyway, I tried it, but when I press setup and enter the 9735 code, nothing happens. There isn’t a number in the corner of the screen, and following the rest of the instructions doesn’t alter any settings (I tried playing a region 1 DVD afterward, still got “Wrong Region Disc” error).
Also I found that I have some cruddy parental lock engaged, which was already there when I plugged in. I don’t know if that might be interfering with the region-changing code? Other than that, maybe I should send it back to Amazon and get a replacement (I bought one from Amazon marketplace….buy a new one from Amazon and hope it works, return this one that was faulty to them?)
It could be, Have you tryed to disable/deactivate the Parental lock?
In case anyone checks back here, the internals seem to have changed. The following is tricky, but as of September 2014 it does seem to work. I would suggest turning parental lock off beforehand anyway (oddly, that even seems to block some avi files).
Setup
Then, very rapidly, press
vol+
vol-
vol+
vol-
mute
If/when you do this correctly and fast enough a new menu appears and you use left/right to change region to ALL
Its a pain to get it right, but stick with it. On current stock it DOES work (eventually).
Good Luck!