Xiaomi Mobile Network Not Available Error UK Fix

Xiaomi Mobile Network Not Available Error UK Fix

This guide helps if your Xiaomi shows "Mobile Network Not Available" when you try to make a call, send a text, or use mobile data. Unlike a standard "No Service" problem, this error often appears when your phone shows signal bars but displays the error as soon as you try to use network services. This usually points to a network registration, VoLTE, or account provisioning issue rather than complete signal loss.

Quick Answer:
If your Xiaomi shows "Mobile Network Not Available", first toggle Airplane mode ON for 30 seconds, then OFF. Then go to Settings → SIM cards & mobile networks → [Your carrier] SIM → Network operators → Search networks → Select your carrier manually. If that doesn't work, check VoLTE is enabled and restart your phone.

Applies to Redmi, POCO and Xiaomi Phones

This guide applies to Xiaomi, Redmi and POCO devices running MIUI or HyperOS on all UK carriers – EE, O2, Vodafone, Three, and their MVNOs.

🔍 Quick Diagnostic Table

Use this table to quickly identify what your symptom means:

What you seeWhat it usually means
Error appears only when callingRegistration or VoLTE issue
Error appears when sending SMSSMS service issue
Mobile data works but calls failVoLTE / IMS issue
Calls work but data failsAPN problem
No signal at allCoverage, SIM, or registration issue

🔍 Check Whether Calls or Data Are Affected

WorksDoesn't WorkLikely Cause
CallsMobile DataAPN
Mobile DataCallsVoLTE / IMS
SMS onlyCallsCarrier provisioning
NothingEverythingRegistration

🔍 Quick Start – Find Your Path

SymptomMost Likely CauseGo To
Error when making calls or using dataNetwork registration failureSection 1
Error only in specific locationsCoverage or mast issueSection 2
Error started after a HyperOS updateSettings resetSection 3
Error appears with full signalAccount or SIM issueSection 4

Section 1 – Network Registration Failure (Most Common)

If "Mobile Network Not Available" appears when you try to use your phone, the most common cause is network registration failure. Your phone is connected to the network but cannot register for service.

Try these in order:

  1. Toggle Airplane mode – ON for 30 seconds, then OFF. This forces re-registration.
  2. Manual network selection – Settings → SIM cards & mobile networks → [Your carrier] SIM → Network operators → Turn off "Choose automatically" → Search → Select your carrier manually.
  3. Check preferred network type – Settings → SIM cards & mobile networks → [Your carrier] SIM → Preferred network type → Select 5G/4G/3G auto (not "5G only" or "3G only").
  4. Restart your phone – A full reboot can resolve temporary glitches.
  5. Check IMEI – Dial *#06# to display your IMEI number. If it shows "Unknown" or "Null", network registration may not be possible – contact Xiaomi support.

Check VoLTE and IMS Registration

In HyperOS, VoLTE and IMS registration are essential for calls and network services. If these are disabled, you may see "Mobile Network Not Available" when trying to call.

Try these in order:

  1. Enable VoLTE – Settings → SIM cards & mobile networks → [Your carrier] SIM → VoLTE → ON.
  2. Check IMS registration (if available) – If your device supports the Phone Information menu, dial *#*#4636#*#* → Phone information → look for "IMS registered". If false, the phone isn't registered for voice services. This menu is not available on all devices.
  3. Restart your phone – After enabling VoLTE, restart to apply changes.
  4. If VoLTE disappeared after HyperOS update – Contact your carrier to refresh VoLTE provisioning.

Section 2 – Error Only in Specific Locations (Coverage or Mast Issue)

If the error only appears at home, work, or in certain areas, the issue is usually coverage or local mast maintenance.

Try these in order:

  1. Check carrier coverage – Visit your carrier's coverage map for your postcode. If coverage is weak, this is expected.
  2. Switch to 4G – Set Preferred network type to 4G/3G/2G auto. 5G can be unstable in some areas.
  3. Enable WiFi Calling – Settings → SIM cards & mobile networks → [Your carrier] SIM → WiFi Calling → ON. This routes calls over WiFi when signal is weak.
  4. Check for mast maintenance – Contact your carrier to ask if there are known issues in your area.

Section 3 – Error Started After a HyperOS Update

If "Mobile Network Not Available" appeared after a system update, the update may have reset network settings.

Try these in order:

  1. Manual network selection – Section 1.
  2. Reset APN – Settings → SIM cards & mobile networks → [Your carrier] SIM → Access Point Names → three dots → Reset to default.
  3. Disable Private DNS temporarily – Settings → Connection & sharing → Private DNS → Turn OFF. This mainly helps if the error appears while mobile data is connected but internet services fail.
  4. Reset Carrier Services (if available) – If your device includes the Carrier Services app, go to Settings → Apps → Manage apps → Carrier Services → Clear data. If the app isn't available, skip this step.
  5. Reset network settings – Settings → Connection & sharing → Reset Wi-Fi, mobile networks, and Bluetooth (removes saved Wi-Fi passwords).
  6. Reboot twice after update – Some updates require a second reboot to fully apply network changes.

Section 4 – Error Appears with Full Signal (Account or SIM Issue)

If you have full signal bars but still see "Mobile Network Not Available", the issue is likely your account or SIM. This is different from signal loss – your phone can see the network but cannot use its services.

Try these in order:

  1. Check your account status – Call your carrier from another phone. Ask if your account is active and in good standing.
  2. Check SIM balance and plan – Ensure your account is active and that any required PAYG balance, bundle, or plan remains valid.
  3. Test your SIM in another phone – If the error also appears, the issue is your SIM or account. Contact your carrier.
  4. Request a new SIM profile – Ask your carrier to send an over-the-air (OTA) SIM refresh.

🔍 Quick Diagnostic Table – Phone vs Network

TestResult
SIM works in another phoneXiaomi issue
Another SIM fails tooPhone configuration
Only calls failVoLTE or IMS
Calls and data failRegistration
Only one location affectedCoverage

Why Does "Mobile Network Not Available" Appear?

  • Network registration failure – The most common cause. Airplane mode usually fixes it.
  • VoLTE or IMS issue – Calls may fail if VoLTE is disabled.
  • SIM card issue – Dirty contacts, loose fit, or faulty SIM.
  • Carrier account issue – Unpaid bill, expired PAYG credit, or suspended service.
  • Coverage or mast issue – Weak signal or temporary maintenance in your area.
  • Settings reset – After updates, preferred network type or APN may change.

⚠️ What NOT to Do

  • Don't factory reset your phone – This is rarely needed for this error.
  • Don't assume your phone is broken – Test your SIM in another phone first.
  • Don't ignore your account status – Check with your carrier before troubleshooting.

Quick Questions

What does "Mobile Network Not Available" mean on Xiaomi?
Your phone cannot connect to your carrier's network to make calls or use data. This is usually a network registration issue.

Why does "Mobile Network Not Available" appear when I have signal?
Signal bars only show connection strength, not registration status. Your phone may be connected to the network but unable to register for service.

How do I fix "Mobile Network Not Available" after an update?
Try manual network selection, reset APN, or reset network settings.

Will resetting network settings delete my photos?
No. Only saved Wi-Fi passwords and Bluetooth devices are removed.

How do I check my IMEI number?
Dial *#06# to display your IMEI. If it shows "Unknown" or "Null", contact Xiaomi support.

Why does this error only appear when I try to call?
This usually indicates a VoLTE or IMS registration issue. Check that VoLTE is enabled in your SIM settings.

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