Xiaomi Mobile Data Stops Every Few Minutes Fix

Xiaomi Mobile Data Stops Every Few Minutes – UK Fix

If your Xiaomi, Redmi, or POCO device keeps losing mobile data every few minutes—dropping connection, showing no internet, or requiring Airplane mode toggling to restore data—this guide explains why and how to fix it for UK networks.

Quick Answer:
Mobile data disconnecting every few minutes is usually caused by Battery Saver, network sleep settings, carrier signal instability, or network switching between 4G and 5G. Start by toggling Airplane mode, restarting your phone, disabling Battery Saver, and temporarily setting the preferred network to 4G only. Only review APN settings if the problem continues.

Why This Happens

  • Battery Saver – Aggressive power management can disable mobile data when the screen is off or when background activity is restricted.
  • Network sleep / standby – Some Xiaomi devices put mobile data to sleep in standby mode unless manually adjusted.
  • Carrier signal instability – Weak signal or network congestion can cause data to drop and reconnect repeatedly.
  • Network switching (4G/5G) – Repeated handover between 4G and 5G can cause frequent disconnections.
  • APN misconfiguration (less common) – Incorrect APN settings can occasionally cause intermittent mobile data issues, particularly after manual changes or SIM swaps.
  • SIM issue – Faulty or poorly seated SIM card can lose connection sporadically.
  • HyperOS / MIUI update effect – Occasionally, a system update may affect network stability until another update is released.

Check Network Status – UK Carrier

Before troubleshooting your phone, check if the issue is network-wide. Check both your carrier's service status and local coverage. Temporary outages or maintenance can also cause repeated data drops.

  • EE – Check coverage at ee.co.uk/coverage or call 150.
  • O2 – Check coverage at o2.co.uk/coverage or call 202.
  • Vodafone – Check coverage at vodafone.co.uk/coverage or call 191.
  • Three – Check coverage at three.co.uk/coverage or call 333.
  • Giffgaff – Check network status at giffgaff.com/network-status.
  • SMARTY – Check coverage at smarty.co.uk/coverage.
  • Lebara / Lyca – These use Vodafone/EE networks respectively. Check the host carrier's coverage.

If outages are reported, wait for the network to resolve the issue.

Quick Fixes to Test First

Try these quick actions. Test data stability for 10 minutes after each step.

  1. Toggle Airplane mode – ON for 30 seconds, then OFF. Forces re-registration on the network.
  2. Turn Mobile Data OFF and back ON – Swipe down, tap Mobile Data icon to disable, wait 5 seconds, tap again to enable.
  3. Restart your Xiaomi – Full reboot clears temporary glitches.
  4. Reinsert SIM – Power off, remove SIM, check for dirt, reinsert firmly, power on.

Disable Battery Saver and Network Power Settings

Battery optimisation is the most common cause of mobile data dropping every few minutes on Xiaomi devices.

Step 1 – Disable Battery Saver:

  1. Settings → Battery → Battery saver → OFF.
  2. Also check: Settings → Battery → Additional battery settings → Sleep standby optimization → OFF (if available on your Xiaomi model).

Step 2 – Remove battery restrictions for network services:

  1. Settings → Apps → App settings → Manage apps → three-dot menu → Show system.
  2. Search for "Mobile data" or "Connectivity".
  3. Tap the app → Battery usage → No restriction.

See our Xiaomi Battery Saver Affects Network – UK Fix guide for more detail.

Adjust Network Preference (4G / 5G)

Network switching between 5G and 4G is a common cause of frequent drops. Setting a preferred network type can stabilise the connection.

  1. Settings → SIM cards & mobile networks → [Your carrier] SIM → Preferred network type.
  2. Select 4G (LTE) only or 4G (preferred).
  3. Test data for 10–15 minutes. If stable, the issue was 5G handover instability.

Note: Some Xiaomi models hide this option. If unavailable, check Settings → Mobile networks → Preferred network type.

Reset Preferred Network Setting

Sometimes after a HyperOS update, the Preferred Network setting becomes corrupted. Resetting it can resolve intermittent disconnections.

  1. Settings → SIM cards & mobile networks → [Your carrier] SIM → Preferred network type.
  2. Switch from 5G to 4G. Wait one minute.
  3. Switch back to 5G (if you prefer using 5G).
  4. Test data for 10–15 minutes.

Check Signal Strength

Weak signal causes data to drop and reconnect frequently. Check your signal strength:

  1. Settings → About phone → Status → SIM status → Signal strength.
  2. Good: -50 to -80 dBm. Should be stable.
  3. Weak: -100 to -120 dBm. Data drops are likely.

If signal is weak, try moving to a different location or near a window. Also remove any thick phone case that may block the antenna.

Compare with another phone: Check signal strength on another phone with the same carrier in the same location. If both phones show weak signal, the issue is network coverage rather than your device.

Check coverage vs location: If signal improves outdoors or in another location, the issue is more likely coverage than your Xiaomi.

Check VoLTE (If Data Drops During Calls)

This only applies if mobile data disconnects during phone calls. Test by temporarily disabling VoLTE:

  1. Settings → SIM cards & mobile networks → [Your carrier] SIM → VoLTE → OFF.
  2. Make a test call and check if data stays connected.
  3. If stable, keep VoLTE off or contact your carrier for provisioning support.

SIM / Network Reset Actions

Try these additional steps. Test data stability after each.

  1. Switch SIM slot – If your Xiaomi has dual SIM, move SIM to the other slot and test.
  2. Test SIM in another phone – If possible, test your SIM in another phone. If data drops persist, the issue is with your carrier or account.

HyperOS / System Update Check

Occasionally, a HyperOS update may affect network stability until another update is released.

  • Settings → About phone → Check for updates. Install the latest available HyperOS update.
  • If the issue started after a recent update, restart your phone again and monitor if the second restart stabilises it.
  • If the problem started immediately after a HyperOS update, it may also be resolved by a future software update.

APN Configuration Check (If Other Steps Don't Help)

Only check APN settings if data drops persist after completing Battery Saver, network preference, and signal checks above. Incorrect APN settings can occasionally cause intermittent mobile data issues.

Verify your APN settings:

  1. Settings → SIM cards & mobile networks → [Your carrier] SIM → Access Point Names.
  2. Select your carrier's active APN.
  3. Use the APN automatically provided by your carrier unless your provider specifically recommends different settings.
  4. If anything looks incorrect, correct it, save, and toggle Airplane mode ON for 30 seconds then OFF.

If unsure about your carrier's APN: Reset to defaults – APN menu → three-dot menu → Reset to default. Then restart. See our Xiaomi APN Settings UK – UK Fix guide for detailed carrier-specific values.

Reset Network Settings (Last Resort)

If nothing else works, reset network settings. This removes saved WiFi passwords and Bluetooth pairings.

  1. Settings → Additional settings → Backup & reset → Reset phone → Reset network settings.
  2. Confirm the reset.
  3. Restart your phone.
  4. Re-enter your APN settings if required.
  5. Test data for 15–20 minutes.

Contact Your Carrier

Contact your carrier if:

  • Data drops persist after completing all steps above.
  • Your SIM works fine in another phone but not in your Xiaomi.
  • You suspect a network provisioning issue with your account.

UK carrier contact numbers:

  • EE: 150
  • O2: 202
  • Vodafone: 191
  • Three: 333
  • Giffgaff: 0330 123 0002
  • SMARTY: 0333 202 0033
  • Lebara: 0808 165 0815
  • Lyca: 020 7135 2375

Final Verdict

In most cases, the problem isn't a hardware fault. It's usually caused by battery optimisation, unstable signal, network switching between 4G and 5G, or temporary software issues. Disable Battery Saver and sleep optimisation first. Set preferred network to 4G only and reset preferred network setting. Check signal strength and compare with another phone. Only check APN and reset network settings as later steps. If all fails, test your SIM in another phone and contact your carrier if the issue persists. If the problem started immediately after a HyperOS update, it may also be resolved by a future software update.

Frequently Asked Questions

Why does mobile data keep disconnecting on my Xiaomi?
Most commonly caused by Battery Saver, network sleep optimisation, weak signal, or 5G handover instability. Disable Battery Saver and set preferred network to 4G only to test.

Does Battery Saver affect mobile data on Xiaomi?
Yes. Battery Saver can restrict background data and turn off mobile data when the screen is off. Disable it if data drops every few minutes.

Why does my Xiaomi lose data when the screen turns off?
Sleep standby optimisation can cut mobile data to save battery. Disable this in Settings → Battery → Additional battery settings → Sleep standby optimization (if available).

Should I use 4G or 5G for stable data on Xiaomi?
If data drops repeatedly, switch to 4G only. 5G handover can be unstable on some networks and Xiaomi models. Use 4G for stability until a system update improves 5G performance.

Why does mobile data reconnect every few minutes?
This usually indicates unstable signal, aggressive battery optimisation, or repeated switching between 4G and 5G rather than a fault with the SIM itself. Try disabling Battery Saver and setting preferred network to 4G only.

Why do I have full signal but no mobile data?
Full signal bars don't always mean mobile data is working. The issue may be network congestion, an APN problem, temporary carrier issues, or a software bug. Test by toggling Airplane mode and opening a website with Wi-Fi turned off.

Can APN cause frequent disconnections?
Yes, but this is less common than battery or network switching issues. Verify your carrier's official APN settings or reset APN to defaults only after trying other fixes.

Will resetting network settings fix mobile data drops?
It can help if settings are corrupted, but try Battery Saver and network preference fixes first. Reset network settings only as a last resort.

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