My cell is nokia 3120. befor using sim it will work every things. But after puting sim it shows Phone Restricted. If i click buttom Undo than it say Enter Restriction Code..................so plz give me solution as fast as u can............

Hi you can try Simpleunlocking.com to get restriction code for your Nokia 3110 Classic and get it unlocked so that you can use other providers SIM in your unlocked mobile..

If your Nokia mobile phone displays Phone Restricted with an Undo option and selecting Undo results in an Enter Restriction Code error, your Nokia mobile phone is Network Locked. This means your Nokia mobile phone has been restricted for use on one specific network and a Restriction Code or Unlock Code must be entered before the phone can be used with alternative networks.

You can get the restriction code from here
Classicunlocking.com

You can get the code from service provider and Unlock it............They will give it.

Unlock it from nearest mobile repairing shop.Good luck

If your Nokia mobile phone displays Phone Restricted with an Undo option and selecting Undo results in an Enter Restriction Code error, your Nokia mobile phone is Network Locked. This means your Nokia mobile phone has been restricted for use on one specific network and a Restriction Code or Unlock Code must be entered before the phone can be used with alternative networks.

You can get the Restriction code from here
Superunlockcodes and get the Free Unlocking instructions from here
mobileunlockguide

If your Nokia mobile phone displays Phone Restricted with an Undo option and selecting Undo results in an Enter Restriction Code error, your Nokia mobile phone is Network Locked. This means your Nokia mobile phone has been restricted for use on one specific network and a Restriction Code or Unlock Code must be entered before the phone can be used with alternative networks.

You can get the Restriction code here
Onlinegsmunlock and Unlock it from Network Lock.

If your Nokia mobile phone displays Phone Restricted with an Undo option and selecting Undo results in an Enter Restriction Code error, your Nokia mobile phone is Network Locked. This means your Nokia mobile phone has been restricted for use on one specific network and a Restriction Code or Unlock Code must be entered before the phone can be used with alternative networks.

Find out the Network lock by call your customer care number check it will in your Phone or SIM memory and contact them or go to nearest Store they will tell.
Then get the Rest ruction code from here
Onlinegsmunlock.com/

call the carrier, should say on the phone, either t-mobile or cingular/att and ask for an unlock code, they will provide it for free, will take 24-96 hours to get emailed to you.

sorry you will have to try online at unlockitnow.com or take the phone to a mobile shop and have them unlock it for you at present they are no free unlocks for bb5 phones.

it seems it is linked with some other network and only that sim would work in it. for this u need to go to a nokia centre and get it unlocked so that all the networks work with this set.