Simlock

If you get a cheap mobile phone , the operator wants you to use HIS network for the discount you got. The operator can do this by making you sign contracts, OR he can lock the phone so you can't use the SIM of a different operator in that phone as a hardware restriction. A phone with SIMLOCK is like a radio that can be tuned to 1 station only.WHAT IS LOCKED:a Phone can be locked the SIM is NEVER locked!The SIM itself is not locked: you can use it in any compatible cellular phone.HOW TO KNOW IF PHONE IS LOCKED:Only phones bought in a "package", together with a SIM, can be locked. If the phone is locked, it is allways written on the box (legal reasons)! If you have to sign a contract before they let you take the phone home, it is likely to be NOT locked. But if you don't have to legitimeer yourself at all, it is probably locked.A phone is likely to be locked if:it is realy cheap; you didn't even have to tell your name in the shop (eg prepaid). A phone is likely NOT to be locked if:it is realy old (Nokia 2110 etc.); you signed a contract to pay abonnement for at least a year; if you buy a loose phone without a SIM (off course). But only by trying with a different SIM you can be shure. The SIMs and the phones won't break from this.

WHAT SHORTS OF ARE THERE:
lock phone to SIM
lock phone to OPERATOR (network lock)
lock phone to CODE (product lock = offer lock)
If your phone is locked to the SIM you cannot use any other SIM than the one you have: SIM broken makes phone useless.If your phone is locked to an operator, you can use any SIM from this operator in your phone. You can switch between abonnement and prepaid as you wish, but not to a different operator.If your phone is locked to a code, the phone checks a special "password" (GID) on the SIM that must match your phone. Providers often use different passwords for abonnement and prepaid.

How to unlock a Nokia phone! - step by step guide
What do you need :
1. A computer (486 and above)
2. A working M2bus Data cable
3. A copy of Nokia Tool ASM-C by Pro
4. A locked phone to unlock.

Getting started Connect the phone

Step 1	Step 2	Step 3

This end of the data cable plugs into your phone.	...Like that !	Locate a spare COM port on the back of your PC.
Step 4	Step 5	Step 6

Close Up of COM Ports.	This end of the data cable plugs into your COM port.	...Like that !

Ok now you're all cabled up - make sure there's no conflicts from other devices you may have fixed to your COM ports (modems, digital cameras etc), you need to configure your unlock program so it will read the phone. Note which COM port you're plugged into (should be 1 or 2) and click the relevant COM port option in the program. As an example the presentation is based on Nokia Tool ASM-C By PRO which is the most reliable software for that job ! (Supports almost all Nokia phones from 51xx and above)

Unlock job
Start Nokia Tool ASM-C By PRO and Click the relevant COM port, and all things going well, you should be up and running! If for some reason you can't make it work try the other COM port. If things still aren't good, you should look at any other devices you may have running.....(usually a modem) And then
click on Read ME button

Once the port is configured corectly and you clicked the Read ME button the phone Data will fill the fields of Nokia Tool.

Then... Click Open All button and your phone will be free of all locks