How to Block a Lost Phone in India Using CEIR and Sanchar Saathi

NEW DELHI, November 8, 2026 — A lost or stolen mobile phone can expose a person to more than the cost of replacing the handset. The device may contain banking alerts, email access, identity documents, private photographs and accounts that use the mobile number for one-time passwords. India’s Department of Telecommunications provides a way to block the handset’s International Mobile Equipment Identity number through the Central Equipment Identity Register (CEIR), available through the Sanchar Saathi portal. A successful request blocks the device from use on mobile networks across India, while the police can continue to track it.

The CEIR process is separate from a police investigation and from blocking a SIM card. A subscriber should report the loss or theft to the police, contact the telecom operator to suspend the old SIM and obtain a replacement SIM for the same number. The replacement is important because the portal sends an OTP to the registered mobile number when the owner submits a blocking request. The official CEIR guidance says SMS on a re-issued SIM is enabled after 24 hours of activation under the applicable telecom rules, so the timing of the request may depend on when the replacement SIM becomes active for messages.

First, try to establish whether the device is misplaced or has been stolen. If it is missing in a public place, do not delay reporting it while repeatedly calling the handset. If theft is suspected, file a police report and keep a copy or acknowledgement. The report identifies the incident and supports the CEIR request. The owner should also contact the mobile operator to suspend the old SIM so that a person who finds the phone cannot use the number for calls, messages or OTPs.

Second, secure accounts that may be accessible from the device. Contact the bank if the phone was used for mobile banking or payment applications, ask the bank to block or secure mobile access where necessary, and change passwords for email and important accounts from a trusted device. Sign out of active sessions where the service provides that option. If the phone had a payment app, contact the provider or bank for account-specific security steps. Blocking an IMEI does not automatically cancel a bank account, freeze a payment app or remove data already stored on the handset.

Third, obtain a duplicate SIM for the same mobile number from the telecom provider. The CEIR portal uses that number for OTP verification. The owner should have the replacement SIM, the police complaint and an identity document ready before starting the online request. The mobile purchase invoice can also be provided if available, but the CEIR guidance lists it as optional. If the handset was bought second-hand, the buyer should keep the available purchase record and any proof that links the device to the owner.

How to block the IMEI through CEIR

Before opening the form, find the handset’s IMEI. On many phones, dialling *#06# displays the IMEI number on the screen. It may also be printed on the original box or recorded on the purchase invoice. A dual-SIM phone can have two IMEI numbers, so the owner should check the packaging or bill and include the relevant device identifiers requested by the form. Do not guess a digit: a wrong IMEI can cause the request to fail or identify a different device.

Open the official Sanchar Saathi portal and choose the CEIR service for blocking a stolen or lost mobile. The form asks for information about the lost handset, including the mobile number, IMEI, device details, the place and date of loss, and the owner’s contact information. Upload the police report and identity proof in the format requested. The purchase invoice may be added if it is available. The portal then asks for OTP verification on the replacement mobile number.

Review the details before submitting. Check that the IMEI matches the handset, that the contact number is active and that the police report relates to the same incident. A request with a wrong IMEI or a document that cannot be read may require correction. After submission, the portal generates a Request ID. Save it carefully, take a screenshot or download the acknowledgement and keep the number with the police complaint and purchase record. The Request ID is used to check the request status and to unblock the handset if it is recovered later.

CEIR also accepts blocking requests through State Police systems. If the portal says that a request already exists for the IMEI and mobile number through State Police, it may mean the police have already registered the device in the system. The owner should not submit repeated requests without checking the existing record. Use the Request ID or police complaint number to follow the status, and contact the investigating police station if the portal indicates that the request was created by the State Police.

The Department of Telecommunications says a phone is blocked within 24 hours after a successful blocking request. Once blocked, the handset cannot be used on any mobile network across India. The restriction applies to the device identifier rather than merely the SIM card, so changing the SIM does not make a blocked handset usable on the network. The official guidance also makes an important distinction: blocking the IMEI does not prevent police from tracking the lost or stolen phone. The block is a network-use restriction, not a substitute for investigation or recovery.

How to check the request and unblock a recovered phone

Use the CEIR “Check Request Status” service and enter the Request ID or the accepted police complaint number. The portal may ask for an OTP and a captcha before displaying the status. Keep the acknowledgement because the request number is difficult to reconstruct if it is lost. If the owner cannot find it, the portal has a separate “Forgot Request ID” service. A status that remains pending should be followed through the portal or the police channel that registered the request.

If the phone is recovered, do not try to use it while it remains blocked. Inform the local police that the handset has been found and follow the CEIR unblocking process. The portal has an “Un-Block Found Mobile” service. The owner submits the required details and Request ID; after the request is processed, the IMEI can be restored for network use. If the original blocking request was registered through State Police, the CEIR guidance says the owner must approach the State Police to register the unblocking request. The route therefore depends on how the initial block was created.

After recovery, check the handset for damage or tampering before restoring sensitive accounts. Change passwords if the device was out of the owner’s control, review banking and payment alerts and check whether any unauthorised transactions occurred. If the SIM was replaced, confirm with the operator that the old SIM is inactive and the replacement number is working. The fact that a phone has been recovered does not prove that the data on it was never accessed.

How to check a phone before buying it

CEIR also provides a way to check the genuineness of a handset before purchase. The buyer can find the IMEI by dialling *#06#, checking the box or looking at the invoice. The portal’s “Know Genuineness of Your Mobile Handset” service can be used to check the device status. The same check is available by SMS: type KYM followed by a space and the 15-digit IMEI number, then send it to 14422. The result can help identify a handset whose IMEI is blacklisted, duplicated or already in use.

If the result shows a blacklisted, duplicate or already-in-use IMEI, the buyer should avoid the transaction. A seller’s explanation that the warning is only a technical error is not enough. Ask for the device to be checked through an authorised source and do not pay until the status is clear. A handset with a tampered or duplicated IMEI can create problems for the buyer, including loss of network access and possible involvement in a stolen-device investigation.

Buy from an authorised retailer or a seller who can provide a verifiable invoice. Check that the IMEI shown on the phone matches the box and purchase document. For a second-hand handset, ask the seller to remove their accounts, reset the device in front of the buyer and provide proof of ownership. A low price is not a reason to ignore an IMEI warning. The DoT advises consumers to use authorised service centres for repairs because unauthorised repairs can expose a device to tampering or malicious changes to its equipment identity.

What CEIR does not do

CEIR blocks a handset from mobile networks after the request is processed, but it does not guarantee that the phone will be recovered. It does not erase photographs, messages or files stored on the device, and it does not automatically close financial accounts. It also does not replace the need to report a crime to the police. A person whose phone is stolen should treat the IMEI block as one part of a wider response that includes securing the SIM, accounts, email, banking applications and personal data.

The system also depends on accurate information. The owner needs the correct IMEI, a working replacement number for OTP verification and the required police and identity documents. A device with two IMEIs may require both identifiers to be checked. If the phone was bought without a bill, the owner can still follow the CEIR process with the mandatory documents listed by the portal, but the invoice can help establish ownership and should be supplied where available. If the phone is recovered, the unblocking process must be completed before expecting it to connect to a mobile network again.

For a family, it is useful to record the IMEI and purchase invoice when a new phone is bought, rather than waiting until the device is lost. Keep the box label or a digital copy of the invoice in a secure place, not only inside the handset. Parents can record the device identifiers for children’s phones, and employers can maintain an asset register for company-issued devices. These records do not prevent theft, but they reduce the time needed to file a police report and submit a correct CEIR request.

The key steps are clear: report the loss to the police, suspend the SIM, obtain a replacement SIM, prepare the police report and identity proof, submit the correct IMEI through CEIR, save the Request ID and check the status. If the phone is found, inform the police and use the correct unblocking route. If a second-hand device is being considered, verify the IMEI before payment. The process cannot undo every consequence of a theft, but it can prevent a lost handset from being used on Indian mobile networks and make it easier for authorities to trace the device.

Frequently asked questions