Guided check
0/4 checkedMatch the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
4 user-level checks are available in this guide.Stop immediately if any warning condition applies.
Show stop conditions
- The tray is bent or stuck
- The phone has liquid or impact damage
Likely causes
- Physical SIM is misaligned, dirty, or damaged
- The active SIM or eSIM line is disabled
- Carrier provisioning or network lock is incomplete
- The tray, reader, modem firmware, or phone hardware is faulty
Quick checks, in order
Restart and toggle airplane mode once
Allow the phone to reinitialize the mobile radio.
Check SIM settings and active line
Dual-SIM phones can disable one slot.
Reseat the physical SIM with power off
Use the correct tray tool and orientation.
Test the SIM in another compatible phone or contact the carrier
Do not cut or sand the SIM.
What does the status bar show?
No SIM
The phone is not detecting the card or active eSIM profile.
Emergency calls only
The SIM is detected but not registered normally on the network.
Invalid SIM or network locked
Carrier compatibility, activation, or lock status is likely.
Stop and get qualified help when
Do not continue troubleshooting if any of these apply:
- The tray is bent or stuck
- The phone has liquid or impact damage
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
Can a software update cause SIM detection trouble?
A modem or configuration issue can appear after an update, but physical SIM and carrier checks still matter.
Will a factory reset activate a SIM?
No. Carrier activation and hardware faults are not normally fixed by erasing the phone.
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