Hello friend this is the that will you to unlock
link :-http://www.mobilecodez.com/unlocking/nokia/3100/
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If Hebrew is not on language setting, you can't. Only way might be installing firmware including Hebrew, a version made for it's use in Israel. How to get it? No idea. Please remeber that this is a rather old phone released about 7 or 8 years ago.
My advice: get a newer one.
Have a look at user guide here
http://www.microsoft.com/en-ca/mobile/support/product/6750-mural/