Please help i wanna unlock my n73

Did you mean sim card not valid ? Did you get this message in your Nokia N73 ? Note : Invalid sim or sim card not valid indicates that your Nokia is locked with your present carrier . To unlock it, use unlock code . You can get it from any of the online vendors like WickedUnlock.com to unlock it .

Is your Nokia N73 locked with any particular network?If so when you try to insert other network sim cards you will get the error "Sim not valid" or "Sim invalid" or "Sim not supported". Try to unlock the mobile.I suggest you can approach Theunlockarena.com and specify the country,locked network.Based on the availability you can get the unlock code along with free instructions.
http://www.theunlockarena.com/nokia-n73/rs13wp9/

If your Nokia N73 says Invalid Sim means it may locked to some network.You need to unlock it.You can get the unlock code from the site Classicunlocking.com
and Unlock Nokia N73 then use with any GSM Network Sim card...You can use any GSM Network Sim card after Unlock it.You cannot unlock CDMA Network locked Phones,Only GSM Network Locked Phones can be unlocked.

Sir you might want to charge your phone and try to use other SIM Card if SIM card registration failed error still occur maybe its time to buy a new one

My dear:
This error usually occurs when you attempt to use a SIM card from a network other than the network from which the phone originated (e.g. your Nokia mobile phone originated from Orange UK and displays the 'Sim Card Not Valid' error when you attempt to use a T-Mobile UK SIM card). The 'Sim Card Not Valid' error usually means the phone has been restricted for use on one specific network and you would need to unlock the phone before alternative network SIM cards can be used.

could You test the new SIM on another phone? Could be the housing of SIM damage on phone - hardware problem - Nokia Service.

in any case you need to find out which network and ask them for the unlock code.

Only the original network to which it is locked can provide this code.

Hello

This error usually occurs when you attempt to use a SIM card from a network other than the network from which the phone originated (e.g. your Nokia mobile phone originated from Orange UK and displays the 'Sim Card Not Valid' error when you attempt to use a T-Mobile UK SIM card). The 'Sim Card Not Valid' error usually means the phone has been restricted for use on one specific network and you would need to unlock the phone before alternative network SIM cards can be used.

could You test the new SIM on another phone? Could be the housing of SIM damage on phone - hardware problem - Nokia Service.

in any case you need to find out which network and ask them for the unlock code.

Only the original network to which it is locked can provide this code.

nokia n73 sim card not valid problem solution system

In my country (Philippines) you have to pay around US$80 to get the unlock code. You may try this site. They offer paid service as well as free service but your phone model doesn't qualify for the free unlock code.

Dear

Please try the following master code 2645366356

please revert u r reply

Thanks

well you have t unlock the phone this can be done online....or take it to a mobile store or mobile tech close to you to hvae the mobile unlock.