Sun SIM Registration (2026)
Sun Cellular
Sun Cellular is a legacy Smart brand — remaining active Sun SIMs register through Smart’s portal and app.
Sun Cellular SIM registration for remaining active lines goes through Smart at simreg.smart.com.ph as of July 2026. Sun is largely phased out, but unregistered Sun SIMs still face deactivation under RA 11934. Use valid ID and OTP on the Smart portal or Smart App. Unofficial guide.
Step-by-step
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Use Smart portal
Sun has no separate portal in 2026.
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Verify OTP
SIM must be active enough to receive SMS.
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Submit ID
Same ID list as Smart — valid IDs.
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Confirm
Check status before relying on the line long-term.
Sun Cellular in 2026
Sun was merged into the Smart ecosystem years ago. New Sun-branded SIMs are rare. If your SIM still connects as Sun, treat it as a Smart-network SIM for registration purposes.
Who must register Sun SIMs
- Any active Sun prepaid SIM still receiving signal.
- Users who skipped the 2023 mass registration window.
If your SIM no longer activates, you may need a new Smart/TNT SIM instead of registering Sun.
Register Sun via Smart portal
- Open simreg.smart.com.ph.
- Enter your Sun mobile number.
- Complete OTP, ID upload, and selfie.
- Submit and confirm.
Full detail: Smart SIM registration.
Check Sun registration status
Use Smart App or portal. SMS codes are inconsistent — see status guide.
Related guides
How to check status
See also our status check wizard.
Frequently asked questions
Is Sun still a separate network?
Sun is legacy; active SIMs register through Smart systems.
Sun registration URL?
simreg.smart.com.ph — Smart link page.
Can I buy new Sun SIM in 2026?
Unlikely at scale; retailers mostly sell Smart/TNT. Registration rules still apply to old Sun SIMs.
Sun SIM deactivated — re-register?
Try portal; if blocked, Smart store with ID. Deactivated guide.
Same ID rules as Smart?
Yes. RA 11934 and Smart acceptance list apply.
Sun SIM still works in 2026?
Some legacy Sun SIMs remain active on Smart network; register to avoid deactivation.
Where to register Sun — Smart store?
Yes. Smart Business Centers accept Sun SIM registration with valid ID.
Sun to TNT migration — re-register?
If you changed SIM brand, register the active number on Smart portal.
Sources
- https://simreg.smart.com.ph
- Smart Sun migration notices
- Republic Act No. 11934
Facts last verified: July 2026.