Alcatel OT600, VM621i,sim card locked. Need reset key.

The network key is a code that is used to unlock your phone's SIM card for use with a specific network carrier. If your Alcatel one touch is asking for a network key when you insert your SIM card, it means that your phone is locked to a particular carrier, and you need to get the unlock code from the carrier or a third-party provider.
To get the network key, you will need to contact the carrier that the phone is locked to and request the code. If you have completed your contract with the carrier, they may provide you with the code for free or for a fee. You will need to provide them with your phone's IMEI number, which is a unique identifier for your phone.
If the carrier refuses to provide the network key or you don't want to pay the fee, you can also try third-party providers. These providers can unlock your phone for a fee, and they may provide you with the network key. However, be cautious when choosing a third-party provider and make sure they are reputable and reliable.
Once you have the network key, you can enter it into your phone when it prompts you to unlock the SIM card. To do this, go to the phone's settings, then to the network settings, and look for the option to enter the network key. Enter the code, and your phone should be unlocked and ready for use with your SIM card.

Hi! If you need to unlock your Alcatel TLi020F2 to be able use it with another carrier SIM card go to e.g. https://www.mobileunlocked.com/alcatel/one+touch+fierce+2/

Or if you forgotten the screen lock password the hard reset will help (but you will loose all data). For instructions check this link: http://www.hardreset.info/devices/alcatel/alcatel-onetouch-fierce-2/

The old sim card is for the network company that sold you the lg. The Alcatel phone could be locked to another network company. So you will have to get the Alcatel phone unlocked if you want to use the old sim card. Contact the place where you bought the phone. They may charge a service fee.

sent me a privacy code

PUK stands for Personal Unblocking Key. This is a uniqueeight-digit code specific to your SIM card. This is required when the PINnumber to unlock your mobile phone is entered incorrectly 3 times. You are thengiven 10 attempts to enter your PUK code. If an incorrect PUK code is enteredafter the 10th attempt, you will block your SIM card permanently and willrequire a new SIM card from your mobile phone provider.
PUK codes can be obtained through the following ways -The PUK code is in your SIM card documentation Starter Pack.If you do not have this then -Please contact your phone service provider.
Your cell phone service provider can give you the PUK code once you give themyour account details and they have confirmed your identity.For details to obtain the PUK code for the SIM card, pleaseclick on this link and follow my instructions.
http://www.fixya.com/support/r5705889-puk_code

try code from service provider.

try online...

Hello
You can unlock phone here
http://sim-unlock.net/sim-lock/3/Unlock_by_code_for_Alcatel_phones/

you can check it with other sim card ,if it remains the same problem ,it may be locked to particular network wont accept any sim card other than the particular network ,you can unlock it and used to other network,try here http://www.theunlockarena.com/alcatel-ot-880-one-touch-xtra/rs13wp9/

Call your service provider or go the store they should have the reset key.