How to block a lost or stolen SIM card in India

How do you block a SIM card in India?

Block the SIM with your operator first, then deal with the phone. They are two separate jobs. Your operator bars the SIM, which stops anyone using your number, your OTPs or your balance. The government's Sanchar Saathi portal blocks the handset by its IMEI, so the phone itself becomes useless on every Indian network. Sanchar Saathi does not block a SIM.

On 10 November 2026 each of the four operators offered a self-service route that needs no phone call. The OTP never goes to the lost SIM: Jio and Vi send it to the alternate number or email on your account, and Airtel's app route needs you to log in on another phone.

This is desk research from the operators' and the Department of Telecommunications' own pages. We have not blocked or replaced a SIM ourselves.

Every operator also takes requests by phone. We don't print helpline numbers here; use the contact page on the operator's own site.

Jio SIM lost: how to block a Jio SIM

Jio's Lost SIM page lets you suspend the SIM, try to locate it, or get its PUK code. You enter your Jio number and receive an OTP on an alternate number or email address. If you never added either to your account, you will need a Jio Store or Jio's customer care instead, and the Reliance Jio page links the official contact pages.

For a replacement, Jio's FAQ says to visit a Jio Store with your Aadhaar card or another valid proof of identity. The replacement costs Rs 50, and your number needs an active recharge plan while it is processed. For security, SMS stays off for 24 hours after the replacement. We could not load that FAQ page directly on 10 November 2026; these details come from Jio's own text quoted in search results.

Jio's consumer charter adds a rule that applies to everyone: report the loss or theft of a SIM to the police. Until Jio deactivates it, you remain liable for charges on the number.

Lost a Jio SIM or eSIM abroad

Jio says you can suspend a SIM lost on international roaming through the same Lost SIM link. Getting it back is harder. Jio requires a live photograph and biometric authentication at a Jio store in India for a SIM or eSIM replacement, so you cannot replace it until you are home. If you used a Jio eSIM, Jio's eSIM help pages cover the profile itself.

How to block an Airtel SIM online

An Airtel blog post describes the app route. Install the Airtel Thanks app on another phone, log in with your Airtel number and the OTP, go to Manage Services and choose Block SIM/Report Stolen, then confirm. Airtel says the SIM is blocked instantly and permanently deactivated within 24 to 48 hours. The post does not explain how you receive that OTP when the SIM is gone, and a second Airtel post sends you to Live Chat under the app's Help section instead, so the menu may differ on your version.

Offline, take ID such as an Aadhaar or PAN card to an Airtel store. Airtel says staff verify you with details such as your date of birth, address and last recharge, and you can block the old SIM and take a new one with the same number in the same visit. Airtel also lets you book a replacement online through the app or website. None of the Airtel pages we read gave a replacement price. More on the network on our Airtel India page.

How to block a Vi SIM

Vi has a Block your SIM page on myvi.in. Enter your number, tap Get OTP to Block SIM, and Vi sends the code to your alternate number and email. Once confirmed, incoming and outgoing services are blocked under Lost SIM status. Postpaid customers keep paying rental under their tariff while the SIM is barred.

The deadline matters. Vi says the SIM must be replaced within 90 days of barring to keep the number active. Plan balance, recharges and value-added services carry over. Take a valid proof of identity to a Vi Store; Vi did not state a replacement price. See our Vi page.

BSNL SIM lost: how to block a BSNL SIM

BSNL's website would not load for us on 10 November 2026, so we could not read its current steps. BSNL's FAQ pages, as quoted in search results, say to file a police complaint, tell customer care immediately, and then submit a request at the customer service centre where you took the connection, with proof of identity and a copy of the FIR. BSNL then issues a new SIM with the same number after verifying your ID and address, and moves any balance across. Older BSNL circle pages list replacement fees from Rs 20 to Rs 200 depending on SIM type and circle; they are dated, so check before you go. Our BSNL page has the rest.

How to block a lost phone on Sanchar Saathi

If the phone went with the SIM, block the handset too. The CEIR user manual from C-DOT, which runs the system for Sanchar Saathi, sets out the order:

1. File a police complaint (an FIR or lost report) and keep a copy.
2. Get a replacement SIM for your number from your operator. The portal sends an OTP to it, so this step comes first.
3. Have your ID proof ready, and the phone's purchase invoice if you have it.
4. On sancharsaathi.gov.in, ceir.gov.in or the Sanchar Saathi app, choose Block Stolen/Lost Mobile, fill in the device and complaint details, and verify the OTP.
5. Keep the 18-digit Request ID. You need it to check status and to unblock the phone if you find it.

Sanchar Saathi's FAQ, as quoted in search results, says SMS on a re-issued SIM starts 24 hours after activation, and that the phone is blocked within 24 hours of the request. A blocked phone can still be traced by the police.

Can you get the same number after losing a SIM?

Yes. Every operator above replaces the SIM on the same number after KYC, in store. Note a knock-on effect: TRAI will not issue a porting code for seven days after a SIM replacement, so if you planned to switch networks, wait a week before you request the porting code.

What if you lose an Indian SIM while travelling?

Block it from abroad through the operator's online page, since that only needs your alternate number or email. Replacement has to wait until you are back in India, at least for Jio. Meanwhile, a travel eSIM gives you data on your phone, though not your Indian number. For a trip in India, our verified prices from August 2026 were $22.50 for Airalo's 10GB over 7 days (read 13 August), $21 for Nomad's 10GB over 30 days (17 August) and $23.99 for Saily's 10GB over 30 days (16 August). The India hub compares those with local SIMs.