Losing or having your phone and SIM card stolen creates immediate risks of fraud, unauthorized transactions, and misuse of your mobile number, which many Filipinos and expats rely on for banking, government services, and daily communication. Acting quickly protects your accounts and limits what thieves can do. This guide explains the practical, step-by-step process to block your stolen SIM card through your telco and your phone through the National Telecommunications Commission (NTC), based on current Philippine procedures.

Why Blocking Both Matters

Your SIM card controls your phone number. Blocking it stops calls, texts, data, and one-time passwords (OTPs) that thieves often use for bank or e-wallet access. The phone itself has a unique International Mobile Equipment Identity (IMEI) number. Blocking the IMEI through the NTC adds the device to a national blacklist shared with all Philippine telcos. This prevents the phone from connecting to any local network, even with a new SIM, making it far less useful to thieves and harder to resell locally.

These two actions work together. SIM blocking is fast and handled directly by your provider. IMEI blocking takes a few days but provides broader protection across networks.

Step 1: Block Your SIM Card Immediately with Your Telco

Contact your telecommunications provider right away—do this first, even before filing reports. Under Republic Act No. 11934 (the SIM Registration Act of 2022) and its Implementing Rules and Regulations (NTC Memorandum Circular No. 001-12-2022), telcos must promptly bar or deactivate lost or stolen SIMs, usually within 24 hours.

How to do it:

Call or use the app/chat of your provider and clearly state that your SIM was lost or stolen. Request immediate suspension or barring of the line.
Common hotlines: Globe at 211 (or via GlobeOne app), Smart at *888 or 888, DITO through their app or customer service. Check your provider’s official channels for the fastest option.
Provide your account details, registered name, and any reference numbers. They may ask basic verification questions.
If your line is postpaid, also request account protection to prevent additional charges.

This step is usually free and can be done from another phone or online. Once processed, your number stops working for outgoing and incoming activity. You can later request a replacement SIM from the same telco using your police report and ID if you want to keep the number.

Step 2: Secure Your Accounts and Try Remote Lock or Erase

While coordinating with your telco, use another device or computer to protect your data:

For Android phones: Go to android.com/find (Google Find My Device) to lock the device and erase data if possible.
For iPhones: Use iCloud.com/find (Find My iPhone) to activate Lost Mode and erase.
For Samsung: Use Samsung Find My Mobile.
Change passwords for email, banking, social media, and government apps linked to your number. Enable two-factor authentication where possible using alternative methods.

These remote actions can work even if the phone is turned off, as long as it connects to the internet later. They do not replace official blocking but reduce immediate harm.

Step 3: File a Police Blotter Report

Go to the nearest Philippine National Police (PNP) station—ideally where the incident happened or your local barangay/police station. File a blotter report (also called a police report or certificate of loss/theft).

Bring details such as the date, time, location, phone brand/model/color, and the IMEI if you have it. The officer will record the incident and give you a copy. This document serves as official proof of loss or theft and is very helpful (often required) when you lack other proof of ownership for NTC processing.

File this as soon as practical—same day or next day is ideal. It also supports any insurance claim or future legal action.

Step 4: Prepare the NTC Affidavit and Supporting Documents

Download Form No. NTC 1-24 – Affidavit of Ownership and Loss with Undertaking from the official NTC website (ntc.gov.ph) or regional NTC sites (examples include ntcr4a.com or region7.ntc.gov.ph). Fill it out completely with your personal details, phone information (brand, model, IMEI if known), circumstances of the loss or theft, and a clear request to block both the handset and the SIM.

Have the completed affidavit notarized by any licensed notary public. Notarization costs typically range from ₱100 to ₱300 depending on location and notary.

Gather these documents:

Accomplished and notarized NTC Affidavit of Ownership and Loss with Undertaking.
At least one valid government-issued ID (passport for foreigners; Driver’s License, UMID, Voter’s ID, or PhilID for Filipinos). Bring photocopies.
Proof of ownership showing the IMEI: Original phone box with IMEI sticker, official purchase receipt or invoice, warranty card, or similar document.
If you have no proof of ownership: Your police blotter report that includes the IMEI.
For dual-SIM phones: Both IMEI numbers.

Tip: Record your IMEI in advance next time by dialing *#06# or noting it from the box/receipt. Store it securely with other important phone details.

Step 5: Submit Your Request to the NTC for IMEI Blocking

Submit your notarized affidavit and supporting documents to the National Telecommunications Commission. The NTC Consumer Welfare and Protection Division handles these requests.

Submission options:

Walk in at your nearest NTC Regional Office or Extension Office (locations in Metro Manila, Cebu, Davao, and other regions—search “NTC [your region] office” for addresses and hours).
Some regional offices accept email submission of scanned copies. Check the specific regional website or call ahead.
Contact options include NTC consumer lines such as (02) 8921-3251 or 8926-7722, or the consumer hotline 1682 in some references. Regional sites often list exact emails or procedures.

NTC reviews the documents for completeness and authenticity. Once approved, your IMEI is added to the national blacklist database shared with all telcos. Confirmation usually comes via email or SMS from NTC or your provider.

Processing time: Typically 3 to 7 working days, though it can vary with volume or incomplete submissions. The block applies nationwide across all networks.

Required Documents at a Glance

Use this checklist when preparing:

Notarized NTC Form 1-24 Affidavit
Valid government ID (photocopy)
Proof of ownership with IMEI (box, receipt, etc.) OR Police blotter with IMEI
For dual-SIM: Both IMEIs listed

No filing fee is charged by the NTC for this consumer service, though you cover notary and any printing/photocopying costs.

Common Pitfalls and Real-Life Scenarios

Many people delay contacting their telco, giving thieves hours or days to attempt fraud or sell the device. Others arrive at NTC without notarization or without the IMEI, causing rejection and extra trips.

If you bought the phone second-hand without documents, the police blotter becomes even more important. Foreigners and expats follow the same process—use your passport as ID. If you are abroad when it happens, you can often email scanned documents or authorize someone in the Philippines to submit on your behalf (with proper authorization letter).

eSIM phones are handled the same way: block the number/SIM via telco and the device IMEI via NTC. Dual-SIM phones require listing both IMEIs when possible.

Note that IMEI blocking works only on Philippine networks. The phone may still connect via Wi-Fi or work abroad. It does not physically locate or recover the device.

If You Recover Your Phone Later

Submit a request for unblocking to the NTC with proof of recovery (such as a new affidavit explaining the recovery and a police clearance or blotter update). Strong evidence is required to prevent abuse of the system. Once unblocked, the device can register on networks again.

Frequently Asked Questions

How quickly can I block my stolen SIM card?
Most telcos process suspension requests immediately or within a few hours when you call or use their app. Full barring under the SIM Registration Act is typically completed within 24 hours.

Do I need a police report to block the phone with NTC?
It is strongly recommended and often necessary if you do not have other proof of ownership like the original box or receipt. Many successful submissions include it.

What if I don’t know or can’t find the IMEI number?
Check the original box, purchase receipt, your Google or Apple account device list, previous photos, or carrier account history. Without the IMEI, NTC cannot process the block effectively.

Can the blocked phone still be used with a new SIM?
No. Once the IMEI is blacklisted by NTC, the device cannot register on any Philippine mobile network, regardless of the SIM inserted.

How much does NTC IMEI blocking cost?
There is no NTC filing fee for this service. You only pay for notarization of the affidavit (usually ₱100–300) and minor costs for copies.

Can I unblock the phone if I find it?
Yes. Submit a formal unblocking request to NTC with proof of recovery and supporting documents. Approval is not automatic and requires verification.

Does this process work for foreigners or expats?
Yes. The requirements and steps are the same. Use your passport as valid ID and follow the same submission process at NTC offices or via accepted channels.

What if my phone has eSIM only?
Block the associated mobile number/SIM profile through your telco. The physical device IMEI is still blocked through NTC using the same affidavit process.

Will blocking stop the thief from using the phone abroad?
Philippine IMEI blocking affects only local networks. Some international carriers participate in global databases, but effectiveness varies—focus on local protection first.

Where do I download the official NTC affidavit form?
Download Form No. NTC 1-24 (Affidavit of Ownership and Loss with Undertaking) directly from ntc.gov.ph or regional NTC websites such as ntcr4a.com. Always use official sources.

Key Takeaways

Contact your telco immediately to suspend the SIM—this is the fastest protection against misuse of your number.
File a police blotter promptly for official documentation.
Download, complete, and notarize the NTC Affidavit of Ownership and Loss with Undertaking (Form 1-24).
Gather valid ID and proof of ownership (or police report) showing the IMEI.
Submit to your nearest NTC Regional or Extension Office (walk-in or email where accepted).
Expect SIM blocking within hours to 24 hours and full IMEI blocking in 3–7 working days.
Keep copies of everything you submit and follow up on confirmation.
Remote locking via Find My Device or iCloud provides immediate additional protection while official processes complete.
The process applies equally to Filipinos and foreigners and covers both physical SIM and eSIM scenarios.

Acting methodically with these steps gives you the best chance of limiting damage from a stolen phone and SIM in the Philippines.