Your phone is gone. Maybe you left it in an auto-rickshaw, or someone lifted it from your pocket at a crowded market. The loss of a handset hurts, but the bigger worry sits inside it: your UPI apps, your email, your photos, your OTPs.
India has a government system that can block a lost phone on every telecom network in the country. It works through the phone’s IMEI number, not the SIM card. But it needs documents, an active mobile number, and the right order of steps. This guide walks you through everything, including what to do in the first ten minutes, before you touch the government portal.
Information in this article was last checked on 29 October 2026. Portal layouts can change, so confirm details on the official Sanchar Saathi and CEIR pages.
Quick Answer
- Protect your money and accounts first. Call your bank to block UPI and cards, and lock the phone remotely if you can.
- Block your SIM through your telecom operator, and get a duplicate SIM with the same number.
- File a police complaint (FIR or lost report) that includes your phone’s IMEI number.
- Block the IMEI on the CEIR portal (Sanchar Saathi) with the police report and your ID proof.
- Save your request ID. You’ll need it to track the request or unblock the phone later.
What CEIR and the IMEI Actually Are
Every mobile handset has a unique 15-digit identifier called the IMEI (International Mobile Equipment Identity). Dual-SIM phones have two IMEI numbers. The IMEI belongs to the phone, not the SIM, which is why changing the SIM doesn’t change it.
CEIR stands for Central Equipment Identity Register. It is a centralised system, run as part of the Department of Telecommunications’ Sanchar Saathi initiative, that tracks mobile devices by IMEI. When you ask CEIR to block your phone’s IMEI, telecom operators stop giving that device service, so a thief can’t use it on Indian networks even with a new SIM.
One limit matters here. Blocking the IMEI does not stop the police from tracking the phone, according to the official portal text. It also doesn’t wipe your data. That’s why you should lock your accounts separately.
Step 1: Protect Your Money and Accounts (First 10 Minutes)
Do this before the government steps. A thief with an unlocked phone can reach your UPI apps and OTPs faster than any portal can act.
- Call your bank’s official helpline (the number on your card or the bank’s website). Ask them to block UPI, cards, and net banking linked to the lost number.
- Lock or erase the phone remotely. Use Google’s Find Hub on Android or Find My on iPhone from another device. Mark the phone as lost.
- Change key passwords from a safe device: your Google or Apple ID, email, and banking logins.
- Log out of messaging apps where the app allows remote logout.
If money has already left your account, treat it as cyber fraud and call 1930 straight away.
Step 2: Block Your SIM and Get a Duplicate
Call your telecom operator through its official customer care number and ask to block the SIM. Then request a duplicate SIM for the same number. You’ll need an ID and may need to visit a store.
This step matters for two reasons. It stops anyone else from receiving calls and OTPs on your number. It also gives you an active number, which the CEIR portal needs. The portal sends a one-time passcode to a mobile number during the blocking request, so you must have a working number to finish.
Step 3: Find Your IMEI Number
You need the IMEI before you block anything. Try these in order:
- The phone’s box. The IMEI is printed on the packaging.
- The purchase invoice or bill. Many shops print it on the receipt.
- Your Google account or Apple ID. The account’s device list can show the IMEI, depending on your phone and account settings.
- Another working phone with the same account. You can sometimes find it in device details.
To see an IMEI on a working handset, dial *#06#. Do this on your replacement phone, and save the IMEI of every phone you own in a safe place, such as a note in your email, before you need it.
If your phone has two SIM slots, note both IMEI numbers. Report both on the portal.
Step 4: File a Police Complaint
The CEIR process requires a police report. The portal’s own instructions say to keep a copy of the police report and an identity proof ready when you submit the request.
Go to the nearest police station, or use your state police’s online complaint facility if it offers one. The online options vary by state, so check your state police’s website. Make sure the complaint:
- States the date, time, and place where you lost the phone
- Lists the phone’s make, model, colour, and IMEI number(s)
- Includes your mobile number
- Leaves you with an acknowledgement or complaint number you can scan
Ask the officer to confirm the type of report you receive (FIR or lost-article report). Different police stations treat lost phones differently, so ask what they can provide, and photograph the document.
Step 5: Block the IMEI on CEIR
Now use the official site. Go to the Sanchar Saathi portal (sancharsaathi.gov.in) and open the CEIR service for blocking a lost or stolen mobile. The older CEIR address (ceir.gov.in) also appears in official help documents. Type the address yourself rather than following a link in a message.
- Choose the option to block a stolen or lost mobile.
- Fill in your phone details, including the IMEI number(s), make, and model.
- Enter the police complaint number and the date and place of loss.
- Add your personal details and the mobile number you still control.
- Upload your documents: the police report and your identity proof. Some guides also mention the phone’s invoice, so keep it ready in case the form asks for it.
- Enter the OTP the portal sends to your number.
- Submit the form and note the request ID.
Take a screenshot of the confirmation. The request ID lets you check the status and unblock the phone later.
One news report says the phone gets blocked within 24 hours of a successful submission. Treat that as an estimate, not a promise.
A Worked Example (Hypothetical)
This scenario is invented to illustrate the process. It isn’t a real case.
Kavita, a nurse, leaves her phone in a shared auto and notices ten minutes later. From her husband’s phone, she logs in to her Google account, marks the phone as lost, and locks it. She calls her bank’s helpline and blocks UPI. She then calls her operator, blocks the SIM, and arranges a duplicate for the next morning.
She finds the IMEI on the phone’s box at home. She files a lost-phone complaint at the local police station and takes a photo of the acknowledgement. The next day, after collecting her duplicate SIM, she submits the block request on CEIR, uploads the police copy and her ID proof, enters the OTP, and saves the request ID.
Kavita doesn’t know whether she’ll see the phone again. But no one can use it on an Indian network, her money is safe, and she has a paper trail for the police.
If You Find the Phone Later: How to Unblock It
The portal says to unblock the IMEI only when you have the phone back in your possession. The steps are:
- Tell the local police that you found the phone.
- Use the unblock option on the CEIR portal, with your request ID.
- Wait for the request to reach the telecom operators, who then lift the block.
Don’t unblock the IMEI unless you physically hold the handset. Doing so could let a stranger use it if you got the wrong device.
What CEIR Can and Can’t Do
- It can block the device on Indian telecom networks.
- It can’t erase your data, so use remote lock and wipe separately.
- It can’t guarantee you’ll get the phone back. Tracing depends on the police.
- It doesn’t block Wi-Fi use. A thief can still use the phone on a Wi-Fi network, so remote lock still matters.
- It needs your documents. Without a police report and ID, you cannot finish the request.
I made the Wi-Fi point from how network-level blocking works, not from an official statement, so verify it if you plan to rely on it.
Before You Buy a Second-Hand Phone
CEIR also protects buyers. Before you pay for a used phone, check its status through the portal’s Know Your Mobile (KYM) service. The official page says you can also send an SMS in the format KYM followed by the 15-digit IMEI to 14422 to verify a device. A phone reported as blocked or stolen shows up in that check, and buying it can leave you with a handset that won’t work, or legal trouble.
Common Mistakes to Avoid
Blocking only the SIM. A new SIM works in the same stolen handset. The IMEI block is what disables the device.
Skipping the police report. The portal expects it, and it also helps you if the phone is used for fraud.
Not having a working number. The portal uses an OTP. Get the duplicate SIM before you submit.
Entering the wrong IMEI. One wrong digit can block someone else’s phone or fail to block yours. Copy it carefully, and check both numbers on dual-SIM models.
Using fake “phone tracking” sites. Scam sites promise to trace your phone for a fee. The official services cost nothing at the point of use, as far as I could find, so confirm that on the portal.
Forgetting your accounts. A blocked IMEI doesn’t log you out of UPI, email, or social apps.
Frequently Asked Questions
1. Will CEIR track my lost phone for me?
CEIR mainly blocks the device. The portal says blocking doesn’t prevent police from tracking it, but you shouldn’t expect to follow the phone’s location yourself.
2. Do I need an FIR to block my phone?
The portal asks for a police report and identity proof. Ask your police station what type of report it can issue in your area.
3. Can I block the phone without a working SIM?
Not easily. The process sends an OTP to a mobile number, so recover your number with a duplicate SIM first.
4. How long does blocking take?
One report says within 24 hours. The official pages I read didn’t state a firm time, so check the portal.
5. Can I unblock the phone if I find it?
Yes. Inform the police, then use the unblock option with your request ID.
6. What if my phone had two IMEI numbers?
Report both. Dual-SIM phones carry two IMEIs.
Conclusion
When a phone goes missing, order beats speed alone. Secure your money and accounts, block the SIM, file the police report, then block the IMEI on CEIR and keep your request ID.
Do one thing today, while your phone is still in your hand: dial *#06#, copy your IMEI numbers, and email them to yourself. If you ever lose the phone, that single note will save you the hardest search of the whole process.