How to Fix Xiaomi HyperOS Home Screen Launcher Crashing

“Emergency Calls Only” on a Xiaomi phone usually means the device is not registering on the mobile network. Common causes include weak signal, SIM detection failure, wrong network settings, carrier outage, or a HyperOS software issue. The fastest fixes are restarting the phone, reseating the SIM, resetting network settings, and checking whether the SIM works in another device.

Steps

Restart the Xiaomi phone and toggle Airplane mode.

Turn Airplane mode on for 10–15 seconds, then turn it off. Restart the device if the signal does not return.
Check the SIM card and SIM tray.

Remove the SIM, clean visible dust, and reinsert it correctly. Test another active SIM if available to confirm whether the problem is with the card or the phone.
Set network selection to automatic.

Open mobile network settings and enable automatic carrier selection. Manual selection can cause a no network Xiaomi issue after travel, carrier updates, or tower changes.
Reset network settings.

Reset Wi-Fi, mobile network, and Bluetooth settings. A corrupted APN or radio profile can block network registration and cause Xiaomi emergency calls only status.
Update HyperOS and check for carrier restrictions.

Install pending system updates. If the phone was recently flashed, unlocked, or imported, verify band support and carrier compatibility to fix cellular signal HyperOS problems.

Common Issues and Fixes

Issue	Likely Cause	Fix	Considerations
SIM detected but no bars	Local carrier outage or weak coverage	Move to an open area, try another location, and confirm network status with the carrier	Most common when the phone is working normally but the area has unstable reception
“Emergency Calls Only” appears after a software update	Network settings corruption or radio bug	Reset network settings and install the latest patch	Check for additional HyperOS updates after the reset
One SIM works, another does not	Damaged, inactive, or unprovisioned SIM card	Test the failing SIM in another phone and request a replacement if needed	This helps separate a SIM problem from a phone hardware issue
No signal after inserting a new carrier SIM	APN mismatch, carrier lock, or unsupported bands	Check carrier lock status, update APN, and confirm LTE/5G band support	Common on imported or previously carrier-locked Xiaomi devices
Signal drops only indoors	Poor building penetration or disabled preferred network mode	Set preferred network to 4G/5G auto and test near a window or outdoors	Indoor materials can weaken mobile signal even when coverage exists outside

Quick Tips

Dual SIM settings: Dual SIM models may assign the wrong SIM for mobile data or calls after updates. Recheck default SIM settings.
Imported devices: Imported Xiaomi models may connect poorly even with a valid SIM if local carrier bands are missing.
Unknown IMEI: If the IMEI shows as unknown or blank, normal signal fixes may not work. Professional repair is usually required.
Safe mode test: Safe mode can help identify whether a third-party app is interfering with mobile network services.

🤔Note:

If the SIM works in another phone but your Xiaomi still shows emergency calls only after a network reset, the problem may be related to hardware, carrier compatibility, or a modem-level software fault rather than basic settings.

Why does a Xiaomi phone say emergency calls only with a working SIM?

A working SIM can still fail to register if carrier selection is wrong, network settings are corrupted, or the phone lacks support for local frequency bands.

Can HyperOS cause no network problems on Xiaomi?

Yes. HyperOS updates can occasionally affect modem settings, APN profiles, or carrier selection. A network reset and system update usually resolve the issue.

💡Protip:

Before deeper resets or repair, creating a local backup is useful because network troubleshooting can sometimes lead to a factory reset. A phone manager such as Dr.Fone can help export important files first.

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