Want to block my sim

this is simple.
all you have to do is to go to ur network operator with ur id card and them them your mobile no. they can easily block the lost sim for you for free.

hi. first lodge police complaint, then submit that copy at mobile center to block that number for the being and also issuing of new SIM with same number with out error. But make sure of this same number if there were no calls exchanged with that SIM once after losing it. with police file, you can track that SIM user if is under use, so that you can collect your other articles without error if possible. and also submit copy of police complaint for blocking debit card usage also. Have fine as early

hey hi buddy....
plz ring ur customer support and ask them TO BLOCK YOUR SIM CARD,SINCE YOU LOST THE MOBILE..they will ask you to repeat the address that you have given as i.d proof,to check that is this your sim card or not...
take care ..thank you

IMEI(International Mobile Equipment Identification). Now if you have lost your mobile handset or your phone has been stolen, you can contact your network provider to block your IMEI number. They might ask you to get a Police FIR copy first, do as they say and finally ask them to block your IMEI number. Mobile network.
providers use a shared hosting service for blocking IMEI numbers, which means if you have asked network ‘Airtel’ to block your mobile handset, it automatically gets blocked by network ‘VodaFone’, ‘Reliance’, ‘Idea Cellular’ and so on.
Now when that thief will switch on your mobile handset, no service providers will allow it to build any connection with them. It does not matter if he changes the mobile SIM card, since SIM card requests for the service with IMEI number and a blocked IMEI number handset will be ignored and the mobile will become an useless toy.

If you know someone from any mobile network, you can also ask him to find out the mobile number that’s being used that IMEI number. In that way you will get the mobile number that thief is using on your handset Take help of mobile number tracker to track any mobile in India.
You can find more information about your mobile handset by entering your mobile IMEI no. Go to IMEI Number Analysis and know more about your handset model, manufacturing date and some internal informations for free.

well 1st of all go to your network provider and ask the to block your sim card as you lost your mobile...by doing so, that person will not be able to use the sim card and the credit....secondly if you have your mobile IMEI number just take it to the station and get the mobile block completely!!!

Most phones these days are SIM locked to certain networks. You either need a SIM card that is on the same network as you lost SIM, or the phone needs to be 'unlocked' to be used with any network (which is a breach of you mobile contract in most instances!).

Call your cellular provider,. If you phone has an ESN they can disable it, if it has a sim card, the card can be disabled so no one can use your minutes but they cannot block the phone from having a new SIM card inserted

my phone is asking for a puk code but iv lost mine so i cant openit this happernd after i was messing around with the security key

SIM Cards and Unlocking your Phone What is a SIM?

Subscriber Identity Module (SIM): A smart card containing the telephone number of the customer, encoded network identification details such as: Call Forwarding, Caller ID, etc., the PIN, and other user data such as the phone book. T-Mobile customers can move their SIM card from any T-Mobile branded phone to any other T-Mobile branded phone without the need to contact Customer Service to activate the new phone. Your rate plan and phone number will follow your SIM to the new phone.

SIM Error Messages:

• Invalid SIM: This error means that the SIM you have inserted into your phone is either inactive or is not compatible with our service. You may purchase a new SIM card from a T-Mobile retail location. Locate a T-Mobile retail store near you.
• Insert SIM: Your SIM is either not inserted in your phone or is inserted improperly. Please remove and re-insert your SIM card. If you continue to receive this error message, your SIM card or phone may be defective. You may take your phone and SIM to a T-Mobile retail store for further assistance and a free SIM card replacement if necessary. Locate a T-Mobile retail store near you.
• Unregistered SIM: This error may occur if your SIM card is not fully activated or if the SIM card registered to your account is different than the SIM you have in your phone. For assistance with this issue, please contact Customer Service.
• SIM Not Ready: This error occurs when you have just powered your phone and is due to the phone not being fully initialized. Please wait a few moments before accessing your phonebook or placing a call.
• OTA OK: This message is displayed when your phone receives a network update, phonebook download, or an Over-The-Air t-zones or Picture Messaging configuration. NOTE: These messages are free of charge and will not be billed to your account or pulled from any text message bucket.
• Enter PUK: These errors can occur if you have entered your SIM PIN three times incorrectly. If you receive this error message, please contact Customer Service for a PIN Unblocking Key (PUK) to restore access to your phone.
• Check card, Card Blocked See Supplier, Blocked, SIM Blocked, or Contact Card/Service Provider: These errors may occur if you have entered your PUK ten times incorrectly. If these errors display your SIM is unusable and you will need to purchase a new SIM card. You may purchase a new SIM card from a T-Mobile retail location. Locate a T-Mobile retail store near you.

SIM PIN:

A SIM PIN can be used to prevent access to your phone. When enabled, your phone will prompt you for the SIM PIN when the phone is powered on. Entering the wrong PIN will prevent you from making or receiving calls. SIM PINs are different from a Security Code that your phone may use to secure other phone functions. Please check your phone’s manual for further security details.

T-Mobile SIM PIN numbers are set to default values before purchase. If you change your SIM PIN, it is recommended that you keep record of the new PIN in a safe location. T-Mobile cannot retrieve a lost or forgotten SIM PINs.

• SIM PIN1: 1234
• SIM PIN2: 5678 (Only available on select phones)

SIM Unlock:

T-Mobile branded phones operating on the T-Mobile network may only use T-Mobile SIM cards. To use a T-Mobile branded phone on another wireless carrier's network with a non-T-Mobile SIM card, you must first request a "SIM Unlock" code from T-Mobile. Conversely, if you have a phone from another North American wireless carrier, you may need to request a "SIM Unlock" code from that carrier before being able to use a T-Mobile SIM card on the T-Mobile network.

SIM Unlock Requests:

T-Mobile customers must meet the following eligibility requirements before contacting Customer Service to request your SIM Unlock code.

The following restrictions apply to all account types:

• T-Mobile can provide SIM Unlock Codes only for handsets sold by T-Mobile USA, with the exception of Danger Sidekick devices. T-Mobile can obtain SIM Unlock Codes for companies acquired by t-Mobile USA (VoiceStream, Aerial, Omnipoint, SOL, Digiph, PCS One, and Powertel).
• SIM Unlock Codes will only be provided after your account has been active for 90 days. Only one unlock code may be provided per customer every 90 days.
• No SIM Unlock Codes will be provided within the 14-Day Buyer's Remorse period. Customers who purchase phones in CA California or via Amazon.com are granted a 30-Day Buyer's Remorse Period.
• SIM Unlock Codes are not always available from the Manufacturer. However, T-Mobile will make a dedicated effort to obtain the SIM Unlock code. Note: Other restrictions may apply depending on account type.

Goodluck