Xiaomi VoLTE Option Missing on EE Devices

Quick Answer:
If the VoLTE toggle is missing or greyed out on your Xiaomi with an EE SIM, dial *#*#86583#*#* once, then restart. If still missing, text "VOLTE" to 150 to check provisioning. For older Xiaomi models, also check Settings → SIM cards & mobile networks → EE SIM → Preferred network type is set to 5G/4G/3G auto.

Why This Happens

VoLTE (Voice over LTE) allows calls over 4G/5G instead of dropping to 3G. When the VoLTE toggle disappears on Xiaomi with EE, three technical causes are most common:

  • Carrier provisioning failure – EE has not enabled VoLTE on your account or SIM profile. This is the most common cause for "Xiaomi 4G Calling not showing".
  • HyperOS update reset – Major updates (MIUI → HyperOS or HyperOS 1.0 → 2.1) can hide VoLTE toggles for certain carriers. Many users report "HyperOS VoLTE missing" after updating.
  • Regional firmware mismatch – Some UK Xiaomi models (especially imported units) lack EE's VoLTE carrier bundle.

Most recent Xiaomi devices sold for UK networks support VoLTE on EE, including Redmi Note series, POCO F series, and Xiaomi 14/15.

Fix 1 – Force VoLTE Toggle to Reappear (Hidden Code)

Xiaomi uses carrier check codes that can hide VoLTE options. This is the most effective fix when "EE 4G Calling missing" after an update.

Step 1 – Open Phone dialer

Step 2 – Dial exactly: *#*#86583#*#*

You will see "VoLTE carrier check was disabled" or "VoLTE carrier check disabled".

Step 3 – Restart your phone

Step 4 – Check VoLTE toggle: Settings → SIM cards & mobile networks → EE SIM → VoLTE toggle should now appear.

Fix 2 – Check EE VoLTE Provisioning on Your Account

EE does not automatically enable VoLTE on all plans or older SIMs. If "Xiaomi VoLTE greyed out" despite running the code, verify your account:

  • Text message: Send VOLTE to 150 (free). EE will reply confirming if VoLTE is active on your plan.
  • EE app: Log in → Plan details → Look for "4G Calling" or "VoLTE".
  • Call EE: Dial 150 → Ask customer service to "Enable 4G Calling (VoLTE) on my account".

Some older EE SIM cards (pre-2019) lack VoLTE profiles. Request a replacement SIM if provisioning is missing.

Fix 3 – Verify Mobile Data / Network Settings

VoLTE requires an active 4G or 5G data session. A common reason for "Xiaomi VoLTE option missing on EE" is the phone being stuck on 3G mode.

Navigation: Settings → SIM cards & mobile networks → EE SIM → Preferred network type → Select 5G/4G/3G auto

If set to 3G only or 2G only, VoLTE cannot function and the toggle will not appear.

Fix 4 – How to Check if EE Has Actually Enabled VoLTE (IMS Registration)

This is the most reliable way to confirm VoLTE is working, regardless of whether the toggle shows.

Method 1 – Make a call on 4G/5G:

  • Ensure you have 4G or 5G signal (not 3G)
  • Make a call to any number
  • If the 4G/5G icon stays visible during the call, VoLTE is active
  • If it drops to 3G or H+, VoLTE is not working

Method 2 – Check IMS registration (advanced):

  • Dial *#*#4636#*#* → Phone information
  • Look for "VoLTE provisioned" – if it says "true", EE has enabled VoLTE on their side
  • Look for "IMS registered" – if "true", your phone is connected to EE's VoLTE servers
  • If both are true but the toggle is missing, this may indicate a HyperOS interface issue – VoLTE likely still works

Method 3 – Service status check: Settings → About phone → Status → SIM status → Mobile voice network type. If it shows "LTE" or "NR", you are on VoLTE.

SIM / Network Reset Actions

If the toggle is still missing after all above, perform in order:

  1. Airplane mode – ON for 30 seconds, then OFF
  2. Restart device – full reboot, wait 2 minutes
  3. Reinsert SIM – power off, remove EE SIM, clean gold contacts, reinsert firmly
  4. Switch SIM slot – on dual SIM devices (POCO F6, Redmi Note 13), move EE SIM to slot 2
  5. Manual network selection – Settings → Mobile networks → Network operators → Search → Select EE manually

HyperOS / System Update Check

If the toggle disappeared after a specific update, EE carrier bundle updates arrive via system patches – check for pending updates in Settings → About phone → System update.

Reset Network Settings (Last Resort)

Path: Settings → Connection & sharing → Reset Wi-Fi, mobile networks, and Bluetooth

⚠️ Removes saved Wi-Fi passwords and paired Bluetooth devices. Does not delete photos or contacts.

After reset: Restart phone, re-run *#*#86583#*#*, set preferred network type to 5G/4G/3G auto, then check VoLTE toggle again.

Contact EE – When Required

If VoLTE toggle remains missing after all fixes, call EE:

  • EE customer service: 150 (free from EE SIM) or 0800 956 6000
  • EE technical support: 0800 079 8586 (8am–8pm daily)

Request them to:

  • Enable "4G Calling (VoLTE)" on your account
  • Send a new SIM profile (over-the-air update)
  • Replace your SIM if it's older than 3 years

Final Verdict

Start with the carrier check code *#*#86583#*#* once – this restores the hidden VoLTE toggle on most EE Xiaomi devices. Then verify EE has enabled VoLTE on your account by texting VOLTE to 150. If the toggle still doesn't appear, check IMS registration via *#*#4636#*#* – if VoLTE provisioned is "true" but the toggle is missing, this may indicate a HyperOS interface issue and calls will still use VoLTE. Reset network settings only as last resort.

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