- Phones and tablets
- Android phones and tablets
No eSIM
OPPO No eSIM on phone: SIM slot 2 recognition problem
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
On OPPO phones updated to ColorOS 16, seeing a message stating "No eSIM" for the SIM 2 option in SIM card settings means the phone fails to recognize the physical SIM in slot 2 or switch back from eSIM.
Safety first
Stop and check this first
- Back up your personal data before running any full factory reset because a factory reset erases all user data, and never use unofficial tools to bypass SIM or carrier locks.
- Always turn off your OPPO phone first before using the SIM ejector tool to remove and reinsert the SIM card.
Safe checks you can perform
- Temporarily disable eSIM in ColorOS SIM card settings
- Restart your OPPO phone using the Power and Volume Up buttons
- Turn off the phone, inspect and clean the SIM card, and reinsert it
- Cross-test with another working SIM card and check for software updates
Leave these tasks to a qualified professional
- Do not attempt this professional task: Request a SIM card replacement from your mobile carrier
- Do not attempt this professional task: Contact OPPO Support or visit the nearest OPPO Customer Service Center
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Request a SIM card replacement from your mobile carrier
What they doIf your SIM card shows scratches, cracks, or bends, or if another working SIM card works in your OPPO phone while your original SIM fails in another device, OPPO recommends requesting a SIM card replacement from your carrier.
They must show younormal detection of the replacement SIM card in your OPPO phone.
In writingthe SIM replacement confirmation or activation receipt from your carrier.
Contact OPPO Support or visit the nearest OPPO Customer Service Center
What they doIf disabling eSIM, restarting, and following the SIM troubleshooting steps do not fix your concern, OPPO advises preparing your warranty card and contacting your nearest OPPO Customer Service or OPPO Support, checking if you need to book an appointment before visiting your local Service Center.
They must show youhow SIM slot 2 and eSIM switching respond during the technician's diagnostic check.
In writingthe official OPPO Service Center inspection record and warranty coverage details.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Temporarily disable eSIM in ColorOS SIM card settings
- Who:
- you, on your OPPO phone running ColorOS 16.
- How:
- open Settings > SIM card & mobile data > eSIM and tap Disable eSIM. OPPO states that temporarily disabling the eSIM can help reset the SIM configuration when your phone has trouble detecting your SIM.
- Result that matters:
- reset the SIM configuration so ColorOS can recognize the physical SIM in slot 2.
- If SIM slot 2 recognizes your physical SIM card after disabling eSIM:
- you can resume normal calls, SMS, and mobile data.
- If the SIM 2 option still shows "No eSIM" or fails to switch:
- proceed to restart the phone.
- Evidence to keep:
- a screenshot of Settings > SIM card & mobile data before and after tapping Disable eSIM.
Evidence: How to Fix SIM 2 and eSIM Recognition Issues on OPPO Phones
Restart your OPPO phone using the Power and Volume Up buttons
- Who:
- you, right after disabling eSIM or when SIM slot 2 is not detected.
- How:
- press and hold the Power and Volume Up buttons and drag the slider up, or press and hold the Power and Volume Up buttons simultaneously for at least 10 seconds to restart your phone.
- Result that matters:
- clear temporary software glitches that stop your OPPO phone from detecting the SIM card.
- If the physical SIM in slot 2 is detected after the restart:
- the issue was a temporary configuration glitch.
- If the error remains after restarting:
- turn off the phone to inspect and clean the physical SIM card.
- Evidence to keep:
- whether the "No eSIM" or "No SIM" message returns immediately after the reboot.
Evidence: How to Fix SIM 2 and eSIM Recognition Issues on OPPO Phones · Why Your OPPO Phone Shows No SIM Even With a SIM Card
Turn off the phone, inspect and clean the SIM card, and reinsert it
- Who:
- you, with your OPPO phone powered off.
- How:
- turn off your phone first, use the SIM ejector tool to carefully remove the SIM card, check it for scratches, cracks, or bends, gently wipe the metal contacts with a soft cloth to remove dust or dirt, and reinsert it properly aligned with the SIM slot.
- Result that matters:
- ensure the SIM card is undamaged, clean, and seated flush in the tray.
- If the phone detects the SIM after cleaning and reseating:
- a loose alignment or dirty contact caused the error.
- If the card shows cracks or bends, or still fails to read when clean:
- test with another phone and another working SIM.
- Evidence to keep:
- the physical condition of the SIM metal contacts and tray alignment.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
Cross-test with another working SIM card and check for software updates
- Who:
- you, with a second phone or another working SIM card.
- How:
- test your SIM card in another phone and insert another working SIM card into your OPPO phone; also check Settings > About Device / Software Update to install the latest operating system version and fix potential bugs.
- Result that matters:
- determine whether the detection failure stays with your original SIM card or with your OPPO phone.
- If another working SIM is detected in your OPPO phone:
- the issue is most likely with your original SIM card.
- If your OPPO phone still fails to detect a known working SIM after updating:
- seek professional service from OPPO.
- Evidence to keep:
- the result of testing another working SIM in your phone and your installed ColorOS version.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Phones and tablets
- Brand
- OPPO
- Product type
- Android phones and tablets
Known code variants
- No eSIM en opción SIM 2 OPPO
- No eSIM for the SIM 2 option
- No se reconoce la SIM 2 en ColorOS 16
- OPPO SIM 2 and eSIM recognition issue
- SIM 2 muestra No eSIM
- SIM 2 shows No eSIM
What it means
The ColorOS SIM card and mobile data subsystem manages recognition of physical SIM slots and embedded eSIM profiles on your OPPO phone. According to OPPO's official support article on SIM 2 and eSIM recognition issues, all OPPO models updated to ColorOS 16 (devices on ColorOS 15 or earlier are unaffected) may fail to recognize a physical SIM card inserted in SIM slot 2, showing a message stating "No eSIM" for the SIM 2 option or having difficulty turning off eSIM and switching back to the physical SIM in slot 2. This message alone never proves that the SIM slot hardware is broken: an eSIM configuration state, a temporary software glitch, or a misaligned or dirty SIM card can cause it.
Warnings and stop conditions
- Mediumeditorial warning
Back up your personal data before running any full factory reset because a factory reset erases all user data, and never use unofficial tools to bypass SIM or carrier locks.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
- Mediumsource verified
Always turn off your OPPO phone first before using the SIM ejector tool to remove and reinsert the SIM card.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
Symptoms and causes
Probable causes · in order
- SIM 2 and eSIM recognition issue after updating to ColorOS 16Common
OPPO documents that on OPPO models updated to ColorOS 16, the device may not recognize the physical SIM card in SIM slot 2, display "No eSIM" for SIM 2, or struggle to switch back from eSIM to the physical SIM in slot 2.
Evidence: How to Fix SIM 2 and eSIM Recognition Issues on OPPO Phones
- Temporary software glitch preventing normal SIM readingPossible
A temporary system error in ColorOS can stop the phone from reading the SIM card normally or refreshing its SIM slot configuration until the phone is restarted.
Evidence: How to Fix SIM 2 and eSIM Recognition Issues on OPPO Phones · Why Your OPPO Phone Shows No SIM Even With a SIM Card
- Improperly inserted, dirty, or physically damaged SIM cardPossible
OPPO notes that even a slight misalignment in the SIM tray, dust on the metal contacts, or scratches, cracks, or bends on the SIM card can cause detection to fail.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
- Faulty SIM card slot or internal hardware abnormalityLess common
In rare cases, a damaged SIM card slot or internal hardware issue prevents the OPPO phone from detecting even a known working SIM card.
Evidence: Why Your OPPO Phone Shows No SIM Even With a SIM Card
Virtual technician
Does No eSIM still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
How to Fix SIM 2 and eSIM Recognition Issues on OPPO Phones
OPPO · 2026 · official_doc
- 2
Cómo solucionar problemas de reconocimiento de la tarjeta SIM 2 y la eSIM en los teléfonos OPPO
OPPO · 2026 · official_doc
- 3
Why Your OPPO Phone Shows No SIM Even With a SIM Card
OPPO · 2026 · official_doc
- 4
Por qué tu teléfono OPPO indica Sin SIM aunque tenga una tarjeta SIM
OPPO · 2026 · official_doc
- 5
¿Por qué no se puede detectar la tarjeta SIM?
OPPO · 2025 · official_doc
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