Last updated: October 2026 · Reading time: about 9 minutes
You reach into your pocket in a crowded metro, a bus or a market, and the phone is simply not there. For most of us the first feeling is panic, and the second is a long list of worries: Who can open my UPI apps? Will someone misuse my WhatsApp? Can I ever get the phone back?
The good news is that India now has a simple, government-run system for exactly this situation. Through the Sanchar Saathi portal of the Department of Telecommunications (DoT), you can block a lost or stolen phone across every Indian mobile network using its IMEI number. Once blocked, the handset becomes useless on Indian networks, and if someone tries to use it with a new SIM, that information can help police trace it.
This guide walks you through the complete process in the right order — what to do in the first hour, how to file the block request, what documents you need, and how to unblock the phone if you recover it.
Quick Summary: What to Do in the First Hour
- Call your own number from another phone — it may simply have been dropped nearby.
- Block your SIM by calling your telecom operator’s customer care so no one can receive your OTPs.
- Lock or erase the phone remotely using Google Find My Device (Android) or Find My (iPhone).
- Secure your money — contact your bank and UPI apps to block UPI access and cards if needed.
- File a police complaint (online or at the nearest police station) and keep a copy.
- Get a duplicate SIM with the same number.
- Block the IMEI on Sanchar Saathi and save the Request ID.
Let us look at each step in detail.
What Is Sanchar Saathi and CEIR?
Sanchar Saathi (sancharsaathi.gov.in) is a citizen-centric portal from the Department of Telecommunications, Government of India. A mobile app version was also launched in January 2025, so you can use the same services from your phone.
One of its core systems is the CEIR – Central Equipment Identity Register. CEIR is a central database of mobile handsets linked to their IMEI numbers. When you report a phone as lost or stolen, its IMEI is placed on a block list that all telecom operators in India follow. The main services available on Sanchar Saathi are:
| Service | What It Does | When to Use It |
|---|---|---|
| Block Your Lost/Stolen Mobile | Blocks the handset’s IMEI on all Indian networks | Phone lost or stolen |
| Know Mobile Connections in Your Name | Shows all mobile numbers issued on your ID | To find and report numbers you did not take |
| Chakshu | Report suspected fraud calls, SMS and WhatsApp messages | Fake KYC, prize, or “your SIM will be blocked” calls |
| Know Your Mobile (KYM) | Checks whether an IMEI is genuine, blocked or duplicate | Before buying a second-hand phone |
Step 1: Find Your Phone’s IMEI Number
IMEI (International Mobile Equipment Identity) is a unique 15-digit number for each handset. Dual-SIM phones have two IMEI numbers. You need it for both the police complaint and the block request. Since the phone is gone, you can find the IMEI in these places:
- The original box — printed on a sticker on the side or back.
- The purchase invoice — most retailers and e-commerce sites print it on the bill.
- Google Find My Device — sign in with the same Google account, open the device details and look for the IMEI.
- Apple Account — for iPhones, the device list in your Apple Account settings shows the IMEI.
Pro tip for the future: Dial *#06# on your current phone right now, take a screenshot of the IMEI, and save it in your email or cloud storage. This one minute of effort saves a lot of stress later.
Step 2: Block the SIM and Secure Your Money
Your SIM card is the key to your OTPs. Before anything else, call your operator’s customer care from another phone and ask them to block the SIM. Then protect your finances:
- UPI apps: Call the helpline of each UPI app you use (or your bank) and ask them to disable UPI on the lost device.
- Bank and cards: Use net banking from a computer to temporarily block debit/credit cards linked to the phone, or call the bank.
- Email and social accounts: Change the passwords of your Google/Apple account first, then email, social media and shopping apps. Log out from all other devices.
- WhatsApp: Once you have the duplicate SIM, simply register WhatsApp on a new phone — it automatically logs out from the old one.
If money has already been debited without your permission, report it immediately on the national cyber crime helpline 1930 or at cybercrime.gov.in. The faster you report, the better the chance of freezing the money in transit. For more on staying safe from such fraud, read our guide on securing your smartphone like a pro.
Step 3: Lock or Erase the Phone Remotely
For Android phones
Open Google Find My Device on any browser or another phone and sign in with the Google account used on the lost phone. You can see its last known location, play a sound, lock the device with a message and a contact number, or erase it completely. Erasing is permanent, so do it only when you are sure the phone will not be recovered.
For iPhones
Use Find My (on another Apple device or the iCloud website). Turn on Mark As Lost — this locks the phone, shows your message on the screen and keeps Apple Pay disabled. Activation Lock stays on, so a thief cannot set the phone up with a new account.
Step 4: File a Police Complaint
A police complaint is mandatory for blocking on Sanchar Saathi. Many states allow you to report a lost article online through the state police website, and you will receive a complaint or e-FIR number instantly. Otherwise, visit the nearest police station. Mention:
- Phone brand, model and colour
- Both IMEI numbers
- Mobile number(s) in the phone
- Date, time and place where it was lost or stolen
Download or keep a clear photo of the complaint copy — you will upload it in the next step.
Step 5: Get a Duplicate SIM
Visit your operator’s store with an original ID proof and request a replacement SIM with the same number. Sanchar Saathi sends an OTP to this number during the block request, so you need it active. Note that for security reasons, SMS services on a replacement SIM are usually restricted for about 24 hours, which means you may need to wait a day before you can receive the OTP.
Step 6: Block the Phone on Sanchar Saathi (CEIR)
Keep these documents ready before you start:
| Document / Detail | Required? |
|---|---|
| Copy of police complaint and complaint number | Yes |
| IMEI number(s) | Yes |
| Mobile number in the lost phone (for OTP) | Yes |
| Government ID proof (Aadhaar, PAN, DL, etc.) | Yes |
| Purchase invoice | Optional, but helpful |
- Go to sancharsaathi.gov.in or open the Sanchar Saathi app.
- Under citizen services, select Block Your Lost/Stolen Mobile Handset.
- Enter the device details: mobile number(s), IMEI number(s), brand, model and invoice (if available).
- Enter the loss details: date, place, state, district, police station and complaint number, then upload the complaint copy.
- Enter your personal details and upload your ID proof.
- Enter the OTP sent to your registered mobile number and submit.
- Save the Request ID shown on screen. You need it to check status and to unblock later.
After submission, the IMEI is shared with all telecom operators for blocking. You can check the progress with your Request ID on the same portal.
What Happens After the Phone Is Blocked?
- The handset cannot make calls, send SMS or use mobile data on any Indian network, whatever SIM is inserted.
- If someone inserts a SIM into the blocked phone, the network can detect it, which can help the police in tracing it.
- The resale value of the phone drops sharply, which discourages theft in the first place.
Remember that blocking the IMEI does not erase your data. That is why the remote lock/erase step and changing your passwords are equally important.
How to Unblock Your Phone After Recovery
If the police or a kind stranger returns your phone, open Sanchar Saathi, choose the Unblock Found Mobile option, enter your Request ID and mobile number, verify the OTP and give the reason for unblocking. The handset will start working on networks again once the request is processed. It is also a good idea to inform the police station that the phone has been recovered.
Buying a Second-Hand Phone? Check the IMEI First
Many stolen phones end up in the used-phone market. Before paying for a second-hand phone, use the Know Your Mobile (KYM) service on Sanchar Saathi, or send an SMS in the format KYM <15-digit IMEI> to 14422. If the result shows the IMEI as blacklisted, duplicate or already in use, do not buy the phone. Always ask for the original bill and box.
Common Mistakes to Avoid
- Waiting too long: Every hour of delay gives a thief more time to try your accounts.
- Erasing the phone too early: Once erased, you can no longer see its location. Lock it first; erase when there is no hope of recovery.
- Losing the Request ID: Without it, unblocking becomes difficult. Save it in email and as a screenshot.
- Falling for “recovery” calls: Fraudsters sometimes call victims claiming to have found the phone and ask for OTPs or “processing fees”. Never share an OTP. Report such numbers through Chakshu. Read more in our guide on new online scams and how to avoid them.
Prepare Today: A 5-Minute Safety Checklist
- Save both IMEI numbers (dial *#06#) in email or cloud storage.
- Turn on Find My Device / Find My and confirm it shows your phone.
- Use a strong screen lock (PIN or pattern of 6+ digits, plus fingerprint/face).
- Set a separate PIN or app lock for UPI and banking apps.
- Set a SIM PIN so a thief cannot use your SIM in another phone.
- Keep the purchase invoice in a safe digital folder.
Frequently Asked Questions
Is blocking a phone on Sanchar Saathi free?
Yes. The service is provided by the Department of Telecommunications and there is no fee. Be careful of anyone who asks for money to “block” or “trace” your phone.
Can I block my phone without a police complaint?
No. A police complaint number and a copy of the complaint are required to submit the block request.
Will blocking the IMEI also block my mobile number?
No. IMEI blocking only blocks the handset. Your number keeps working on a duplicate SIM in a new phone. Blocking the old SIM is a separate step you do with your operator.
Does Sanchar Saathi show me the location of my phone?
No, the portal does not show the location to the user. Tracing information is used by the authorities. To see the last known location yourself, use Google Find My Device or Apple Find My.
What if I forgot my Request ID?
Check the SMS and screen confirmation you received at the time of filing. If you still cannot find it, contact the police station where you filed the complaint or use the help options on the Sanchar Saathi portal.
Final Words
Losing a phone is stressful, but it does not have to become a financial disaster. Act in the right order: block the SIM, secure your money, lock the device, file a police complaint, get a duplicate SIM, and block the IMEI on Sanchar Saathi. Spend five minutes today saving your IMEI and turning on Find My Device — your future self will thank you.
Note: Portal menus and processes can change. Always follow the latest instructions shown on the official Sanchar Saathi website or app. This article is for general information; please read our disclaimer.