Sun SIM Registration Online 2025 – Complete Guide

Online registration of your Sun SIM in 2025 is fast and simple. It only takes a minute to comply with the requirements of the Registration Act and safeguard your mobile number from scams. You can register your Sun SIM through the Smart Communications website by providing your mobile number, confirming it through an OTP, and providing necessary information such as a government-issued ID and a selfie for verification.

The same applies whether you decide to register online, via SMS, or in person at a store. The only difference is the convenience of completing the registration while ensuring the SIM card is active and protected. In this article I will guide you so you do not miss the deadline for registration and complete the processes properly without any hitches.

SIM registration for Sun refers to associating a mobile number with an account that has been previously verified. This registration is mandatory as stated in the SIM Registration Act (Republic Act No. 11934), which seeks to address criminal activities related to the use of mobile phones such as scams, fraud, and many more.

Through SIM registration, the telecom company (Sun Cellular which is currently owned by Smart Communications) is able to validate that the SIM is indeed in possession of a bona fide user.

• The legislation stipulates that all mobile phone owners must register their SIM cards for the purposes of: 
• Avoiding abuse: Off the shelf SIM cards can be activated and employed for nefarious purposes. 
• Safeguarding citizens: SIM card registration enables law enforcement to investigate and monitor unlawful communications.
• Sustain business relationship: Registration unlocks many conveniences which are not offered to unregistered users, such as reliable support and special advertising deals. 
• Following the legislation: Unregistered SIM cards will be deactivated permanently after the set period.

• All registered users of Sun SIM cards who are yet to register.  
• All new subscribers of Sun SIM Card must register immediately.  
• Must comply with all users be it in prepaid or postpaid.

Detailed Requirements

1. Valid Identification

It must be a government ID bearing your picture and other identity details. The ID must be current (not expired) and not damaged in any way. Having an ID that is not expired indicates that your identity is confirmed and associated with your SIM card.

2. Your Sun SIM and Mobile Device

SIM cards must be inserted in the phone if OTPs are to be sent and verifications completed.

3. Internet Access

As registration is done online, uninterruptible access to the official portal for document upload is necessary.

4. Digital Copies of Documents

You will have to capture a clear image or scan of both your ID and a selfie to verify your identity. This step in biometrics is done to prevent identity fraud and fake signups.

Step 1: Visit the Official Registration Portal

Open your browser and go to the official Smart/Sun registration website:
https://simreg.smart.com.ph

This portal is secure and managed by Smart Communications, the parent company of Sun Cellular.

Step 2: Input Your Mobile Number

Type in your Sun Mobile number consisting of 10 digits, and ensure that there are no mistakes because the OTP will be sent here.

Step 3: Receive OTP (One-Time PIN)

An OTP is a one-time passcode sent to your Sun Number which verifies that you have access to the SIM card. It expires in a few minutes, so it must be entered right away.

Step 4: Fill Out Personal Information

Mismatches could result in rejection—so be careful. You will be asked for your international ID’s full name, birthdate, gender, nationality, and ID details. This data must correspond verbatim with your ID.

Step 5: Upload Your ID and Selfie

• ID Upload: Ensure a clear photograph of your ID is taken. Confirm that both the text and your photo are visible.  
• Selfie Upload: Snap a selfie ensuring there are no blocks between the camera and your face such as sunglasses or hats. Hats should be removed and so should any other obstructions. This ensures proper lighting which is required.

Step 6: Provide Your Address

Address must match the ID or official document received. This is useful for verification purposes and for any future communication.

Step 7: Review and Submit

Double-check every detail of your work before submitting. Mistakes can postpone or cancel your registration completely.

Step 8: Confirmation and Reference Number

After completing the submission, you will be sent a notification and a distinct reference number. Keep this number for any future questions or checks you wish to make concerning your registration.

Read Also: DITO SIM REGISTRATIONS

• Your SIM is active and functional. 
• Your details will be protected by Smart Communications. Additional data and offers might be received as forms of appreciation for registering.
• Data and other offers might be received as a sign of gratitude for signing up. 
• You can now use your Sun SIM legally, without any pauses.

• Your Sun SIM will stop working after the government’s given timeframe. 
• The use of calling, texting, and mobile data services will be revoked. 
• You will need to register your SIM or purchase a new one in order to reactivate it.

• If you cannot register online, you may:  
• Go to any Smart/Sun Store: For face-to-face registration, please take your SIM and an ID.  
• Contact Customer Support: Call (02) 8 395-8000 for support.  
• Make use of affiliated locations: Certain convenience stores or kiosks have SIM registration services.

• When taking your ID photo and selfie, make sure to use a good camera or a scanner.  
• Check that your internet connection is stable for the entire duration.
• For security reasons, avoid using public Wi-Fi networks.  
• Guarantee immediate registration to avert problems at the last minute.  
• Ensure the safekeeping of your reference number.  
• Infinite re-registration attempts will cause system flags, so only do so if you truly need to. Waiting for the system flag to cool down is the only option after multiple tries.

Problem	Solution
OTP not received	Check signal, restart phone, request OTP again
ID photo unclear	Retake photo in good lighting, ensure text is readable
Selfie rejected	Remove accessories, take photo in bright light
Website errors	Clear browser cache, try a different browser or device
Mismatched information	Double-check details before submitting

The process of registering your Sun, Smart, TNT or Globe SIM card on the internet in 2025 SIM Registration Act has laid down the guidelines which aims to fortify the security of users against scams and fraudulent activities. If you are a user of Sun SIM-which is now under the Smart network-you can complete the registration via the official website by inputting your mobile number which will then be verified through OTP in addition to some other details like full name, birthdate, address, and even the nationality.

It requires some additional steps such as uploading a photo of a government issued ID-documents such as passports, national IDs, and driver’s licenses are acceptable-and selfies for verification of identity. At the end, after Revision, terms and check boxes needs to be accepted for submission of the form which then will trigger the receipt of confirmation in a text message along with a reference number

The online steps for registering a SIM with Smart, TNT, and Globe are the same. You usually need to go to the provider’s portal, provide your SIM number, confirm your SIM using OTP, give personal details, and finally, submit documents. This also applies to TNT users which includes the free 4G and 5G SIMs.

Registration eligibility can also be checked through an app or a phone call (e.g. *1202# for Smart). Registration is open for the general public such as controlled account holders, international users, and business profiles. All users have the choice to register anytime, anywhere without visiting a physical store.  

Regardless of the network, the prerequisites for online SIM registration includes: a recent government issued ID, a SIM card number, and a recent picture of yourself. After the registration, you will receive a confirmation via SMS which validates that your SIM is still active and your identity is secure.

It is required as for 2025 the SIM Registration Act for all users to register their Sun SIM card online, keeping their number active, secure, and in compliance with the law. The registration process allows for completion from any location where an internet connection is available, making it straightforward and user-friendly. The provision of precise personal details, a valid government-issued ID, and even a selfie goes a long way in preventing scams.