Xiaomi Network Settings Reset After HyperOS Update

Quick Answer:
If your mobile data stopped working after a HyperOS update, first reset APN settings: Settings → SIM cards & mobile networks → [Your carrier] SIM → Access Point Names → three dots → Reset to default → Restart. Then check Mobile Data is ON and Data Saver is OFF. In most cases, APN settings are reset during the update – this fixes the issue.

Applies to Redmi, POCO and Xiaomi Phones

This guide applies to Xiaomi, Redmi and POCO devices running HyperOS, covering UK carriers including EE, O2, Vodafone, Three, Giffgaff, SMARTY, and others.

🔍 Quick Start – Find Your Path

SymptomMost Likely CauseGo To
4G/5G icon visible but no internetAPN settings resetSection 1
No 4G/5G icon at allNetwork mode or signal issueSection 2
Data works on some apps but not othersData Saver or permissionsSection 3

Section 1 – APN Reset (Most Common)

HyperOS updates often reset APN settings to default, which may not match your carrier's requirements. This is the most common cause of "signal but no internet" after an update.

Try these in order:

  1. Reset APN to default – Settings → SIM cards & mobile networks → [Your carrier] SIM → Access Point Names → three dots → Reset to default → Restart.
  2. Check your APN is selected – After reset, go back to Access Point Names and ensure the dot is next to your carrier's APN (it should auto-select).
  3. If still not working: Manually create a new APN using your carrier's settings – check their website or contact them.

Section 2 – No Signal or Network Mode Issue

If the update changed your preferred network type, you may have no signal at all. This is less common but can happen.

Try these in order:

  1. 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").
  2. Toggle Airplane mode – ON for 30 seconds, then OFF. This forces reconnection.
  3. Restart your phone – A second reboot after the update can sometimes resolve registration issues.

Section 3 – Data Saver or Permissions

If some apps work (e.g., WhatsApp) but others don't (e.g., Chrome), Data Saver or app permissions may be blocking data.

Try these in order:

  1. Turn off Data Saver – Settings → SIM cards & mobile networks → [Your carrier] SIM → Data saver → OFF.
  2. Check per-app data restrictions – Settings → Apps → Manage apps → Select app (e.g., Chrome) → Data usage → Background data → Allow.
  3. Remove battery restrictions for apps – Settings → Apps → Manage apps → Select app → Battery saver → Set to "No restrictions".

⚠️ What NOT to Do

  • Don't factory reset your phone – APN issues don't need a factory reset.
  • Don't assume your SIM is faulty – test it in another phone first.
  • Don't ignore Data Saver – it's often re-enabled after updates.

Why Did Mobile Data Stop Working After HyperOS Update?

  • APN settings reset (most common) – The update resets APN to default values.
  • Preferred network type changed – The update may have set it to "5G only".
  • Data Saver re-enabled – HyperOS can turn Data Saver back on.
  • Carrier profile refresh – Some updates include new carrier profiles that take time to apply.

Quick Questions

Why did my mobile data stop working after HyperOS update?
Most commonly APN settings were reset. Reset APN to default (Section 1) – this fixes the majority of cases.

How do I reset APN on Xiaomi?
Settings → SIM cards & mobile networks → [Your carrier] SIM → Access Point Names → three dots → Reset to default → Restart.

Why do I have 4G/5G signal but no internet?
Signal bars only show network connection – not data routing. This is almost always APN-related. Check Section 1.

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

Should I reinsert my SIM after an update?
It can help if the update caused SIM detection issues, but APN reset is usually enough.

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