Xiaomi VoLTE Turns Off After Reboot

This guide helps if your Xiaomi keeps turning VoLTE off every time you restart your phone, VoLTE doesn't save after reboot, the toggle is greyed out after restart, or VoLTE keeps disabling itself.

Quick Answer:
If VoLTE turns off after rebooting your Xiaomi, first check that your preferred network type is set to 5G/4G/3G auto (not "3G only"). Then toggle Airplane mode ON for 30 seconds and OFF – this often forces the network to reconnect properly. If it still turns off, your carrier may not have VoLTE correctly provisioned on your account – contact them to check.

Applies to Redmi, POCO and Xiaomi Phones

This guide applies to Xiaomi, Redmi and POCO devices running MIUI or HyperOS, including Redmi Note series, POCO X/F series, and Xiaomi 14/15.

🔍 Step 1 – Choose Your Scenario (Decision Tree)

Instead of trying all fixes, pick your symptom:

  • Scenario A – VoLTE turns off after reboot (toggle is off, but not greyed out): Go to Section 1 – Network Re-registration Fix
  • Scenario B – VoLTE is greyed out after reboot (can't toggle it on): Go to Section 2 – Greyed Out After Reboot
  • Scenario C – VoLTE turns off after reboot, and also during normal use: Go to Section 3 – Carrier or Account Issue

Section 1 – Network Re-registration Fix (Scenario A)

If VoLTE turns off after reboot (toggle is off, but not greyed out), the issue is often that your phone didn't reconnect to the network properly after restart. Try these in order:

  1. Check preferred network type – Settings → SIM cards & mobile networks → [Carrier] SIM → Preferred network type → Select 5G/4G/3G auto (not "3G only")
  2. Toggle Airplane mode – ON for 30 seconds, then OFF. Wait 60 seconds. This forces the phone to re-register.
  3. Remove and reinsert SIM – Power off → remove SIM → wait 10 seconds → reinsert → power on. This refreshes the SIM profile.
  4. If still not working: Reset network settings – Settings → Connection & sharing → Reset Wi-Fi, mobile networks, and Bluetooth (removes saved Wi-Fi passwords only).

Section 2 – Greyed Out After Reboot (Scenario B)

If VoLTE is greyed out (not just off) after reboot, the phone can see the option but cannot enable it. This can happen for a few reasons, often related to the network registration process.

  1. Toggle Airplane mode on/off 2-3 times – This often forces the network to reconnect properly.
  2. Change preferred network type – Set to "4G/3G/2G auto" → reboot → set back to "5G/4G/3G auto" → reboot. This can reset the network stack.
  3. Remove and reinsert SIM – Power off → remove SIM → wait 10 seconds → reinsert → power on.
  4. If still greyed out: Try the hidden code *#*#86583#*#* – on some devices, this disables carrier checks (may not work on all HyperOS versions). Restart after dialling.

Section 3 – Carrier or Account Issue (Scenario C)

If VoLTE turns off after reboot and also during normal use, the issue is more likely on your carrier's side.

  1. Call your carrier – EE (150), O2 (202), Vodafone (191), Three (333)
  2. Ask directly: "Is VoLTE enabled on my account? Can you check and send a new SIM profile?"
  3. If your SIM is very old: Request a replacement SIM – older SIMs may lack VoLTE profiles.

Why Does VoLTE Turn Off After Reboot? (Simple Explanation)

When you restart your phone, it needs to reconnect to your carrier's network. Sometimes this reconnection doesn't complete properly for VoLTE. This can be related to:

  • Network registration timing – The phone may not register for VoLTE quickly enough after boot.
  • Carrier settings reload – Some carrier settings are applied at startup and may override your preference.
  • SIM profile refresh – The SIM may not load its VoLTE profile correctly on first boot.

In most cases, toggling Airplane mode or reinserting the SIM fixes the issue because it forces the phone to re-register on the network.

Quick Questions

Why does VoLTE turn off every time I restart my Xiaomi?
Most commonly the phone doesn't re-register on the network properly after boot. Toggle Airplane mode on/off after reboot – this forces re-registration. If that doesn't work, check preferred network type (should be 5G/4G/3G auto).

Why is VoLTE greyed out after reboot on my Xiaomi?
This often means the phone can see the option but hasn't been able to register for VoLTE. Toggle Airplane mode 2-3 times or remove and reinsert your SIM – this often resolves it.

Does the code *#*#86583#*#* work on all Xiaomi phones?
No. It works on many but not all devices or HyperOS versions. If nothing happens, your device doesn't support it – try the other fixes first.

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

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