help on unlocking nec n341i

can anyone help me out how i can unlock my nec n341i?

imei #: 351180/51294149/8

network code: 214 07 telefonica movistar

thanks in advance.

I am trying also the way to unlock mine nec n341. I have been annoying
on Internet and have found on a Spanish forum a company that do it for
20 €, but is found to Madrid. :-?