Need sim unlock code for nokia N73

Problem:

i am in problem please help me.i have nokia N73 which was initially used in Japan by other. but now when i am trying to use the new sim card here in Nepal, the message "sim card not valid" appears on the screen.

Solution:

To enter the code to the phone (switch on without SIM card).Input the Code in the phone as follows: #pw+??????????????+1##pw+??????????????+2##pw+??????????????+3##pw+??????????????+4##pw+??????????????+5##pw+??????????????+6##pw+??????????????+7#Here: ?????????????? You should enter generated code.First code in the end of the string must be added + 1#Code number 7 in the end of the string must be added + 7#If you have proper software and You know on which lock, phoneis closed just simply enter proper CODE.If YOU DONT KNOW - which lock is closed do the following: 1. Enter the first code, if it’s the wrong code - WAIT 30 seconds!!! And then: 2. Enter the code number seven this will open all locks.How to get 'p' 'w' '+' signs?Press * several times on keyboard of phone...There's no guarantee that any code will work, because I couldn't find a Japanese pre-set network code '44020000' for Vodafone required for calculating the code. One of these might work: IMEI: 351851017293607 Your code's are:#pw+947422376576223+1##pw+198444027616245+2##pw+024523552267724+3##pw+427917252521212+4##pw+992932523001337+5##pw+724960454241361+6##pw+323156750133451+7#!!Warning!!If the codes don’t work after entering 5 codes You will lock the ‘CODE UNLOCK FUNCTION’ and it will be possible to unlock the phone only by using a cable/device.