Xiaomi VoLTE Not Working on Tele2 Sweden

Xiaomi VoLTE Not Working on Tele2 Sweden (2026 Fix)

If your Xiaomi, Redmi, or POCO phone drops to 2G/3G during calls, shows "Can't use VoLTE", or the VoLTE option is missing or greyed out on Tele2 Sweden, this guide covers common troubleshooting steps. This issue can affect both 4G and 5G connections. Sweden's network changes make VoLTE increasingly important for voice calls on compatible 4G/5G devices.

Before You Start – Quick Checks

  • Check your subscription and provisioning – Confirm with Tele2 that VoLTE is enabled for your subscription and SIM.
  • Toggle Airplane Mode – Turn on for 30 seconds, then off to refresh network registration.
  • Restart your phone – Clears temporary software glitches affecting IMS registration.
  • Test your SIM in a known-compatible phone – This is the quickest way to identify if the issue is your Xiaomi device or your SIM/plan.

If these quick checks don't work, continue with the step-by-step guide below.

Quick Navigation

Diagnose the Issue First

Before making changes, determine the pattern of your VoLTE issue:

  • Is the option missing entirely? – The VoLTE toggle does not appear in your SIM settings.
  • Is the option visible but calls drop to 2G/3G? – The toggle is on, but during calls the network indicator changes from 4G/5G to 2G/3G.
  • Does it work on one SIM but not the other? – In dual-SIM setups, VoLTE availability may depend on which SIM is selected for mobile data.
  • Did it work before? – Did this issue start after a system update, SIM swap, or traveling abroad?

Why This Happens

  • Plan or carrier restrictions – Some Tele2 MVNOs may have inconsistent VoLTE support.
  • Tele2 device compatibility and IMS provisioning – VoLTE availability can depend on the device model, software/firmware, and Tele2's network provisioning. Some imported or unsupported device variants may not work correctly even when the hardware supports VoLTE.
  • Xiaomi carrier check – Xiaomi's VoLTE carrier check may block the feature, even when the network supports it.
  • IMS registration failure – The phone's IMS may not be properly registered on Tele2's network. This can indicate a provisioning, compatibility, firmware, or network-registration problem.
  • Software or configuration issues – Incorrect network settings or outdated system software can prevent VoLTE from working.

Check Plan & Carrier Support

Before troubleshooting your device, verify that your Tele2 plan supports VoLTE:

  • Tele2 Sweden – Generally supports VoLTE on compatible subscriptions and devices.
  • Tele2 MVNOs – Support varies. Check with your specific provider.

Important: 2G/3G Shutdown

  • Tele2 is shutting down its 2G and 3G networks.
  • After the shutdown, phones without VoLTE support may not be able to make calls.
  • Ensure VoLTE is enabled on your Xiaomi to continue making calls.

Test SIM in Another Phone

Why this matters: This is the quickest way to determine if the issue is your Xiaomi device or your SIM/plan.

  • Insert your Tele2 SIM into another phone that supports VoLTE
  • Check if VoLTE works on the other phone (look for LTE/4G indicator during a call)
  • If VoLTE works normally on the other phone, the issue is more likely related to your Xiaomi device or its configuration – continue with the steps below
  • If VoLTE also doesn't work in the known-compatible phone, the problem is more likely related to your SIM, subscription, provisioning, or carrier support – contact Tele2

If the SIM works normally in another phone, continue with Step 1.

Step 1: Enable VoLTE in Settings

Why this matters: VoLTE must be explicitly enabled on your Xiaomi device.

  • Settings → SIM cards & mobile networks
  • Tap your Tele2 SIM
  • Look for VoLTE, 4G calling, or Use VoLTE and toggle it ON

Important notes:

  • On some Xiaomi models, the VoLTE option may be hidden by default and needs to be unlocked via a diagnostic code.
  • On some Xiaomi dual-SIM devices, VoLTE availability may depend on which SIM is selected for mobile data.

If the option is enabled but VoLTE still doesn't work, move to Step 2.

Step 2: Check VoLTE with the Hidden Xiaomi Code

Why this matters: Xiaomi devices have a hidden diagnostic code that can toggle the VoLTE carrier check. In some cases, this check blocks VoLTE even when the network supports it.

  1. Open the Phone app
  2. Dial *#*#86583#*#*
  3. If supported, the phone may display a message indicating that the VoLTE carrier check has been disabled.
  4. This may enable the VoLTE option if it was previously hidden.
  5. Restart your phone and check if VoLTE works

Note: This code toggles the carrier check on and off. Dialing it again will re-enable the check.

If VoLTE still doesn't work, move to Step 3.

Step 3: Check IMS Registration Status (If Available)

Why this matters: VoLTE requires IMS registration. The IMS status can reveal whether the phone is successfully registered for VoLTE on Tele2's network.

  1. Open the Phone app
  2. Dial *#*#4636#*#*
  3. Select Phone information
  4. Tap the three dots in the top right corner
  5. Select IMS Service Status
  6. Check if Voice over LTE shows as Available or Registered

Note: The IMS Service Status menu is not available on every Xiaomi model or HyperOS/MIUI version. The exact menu and available IMS information vary by model and software version.

If IMS shows "Not available" or "Not registered":

  • Try toggling Airplane Mode on and off to re-register
  • Try toggling VoLTE off and on in Settings while on LTE
  • This can indicate a provisioning, compatibility, firmware, or network-registration problem.

If IMS registration fails, move to Step 4.

Step 4: Check Device Compatibility

Why this matters: Not all Xiaomi devices are fully compatible with Tele2's network requirements for VoLTE. Tele2 has specific device compatibility and IMS provisioning requirements.

  • European/Global variants – Some Xiaomi EU models may work, but with potential compatibility variations.
  • Imported China or India variants – Are more likely to have VoLTE compatibility issues on Tele2.
  • Check your device model – If your Xiaomi is an imported variant, it may not be fully compatible with Tele2's VoLTE requirements.
  • If your device is not compatible, you may need to consider using a supported device or carrier.

If your device is a European/Global variant and VoLTE still doesn't work, move to Step 5.

Step 5: Check for System Updates

Why this matters: Software updates often include modem firmware and IMS improvements that can enable or improve VoLTE.

  1. Settings → About phone → Check for updates
  2. Install any available updates
  3. Restart your phone and check if VoLTE works

If you're already on the latest version and VoLTE still doesn't work, move to Step 6.

Step 6: Reset Network Settings

Why this matters: This resets Wi-Fi, mobile data, and Bluetooth settings without deleting personal data. It clears corrupted network configurations that may be preventing IMS registration.

  1. Settings → Connection & sharing (HyperOS) or Settings → Additional settings → Backup & reset (MIUI)
  2. Select Reset Wi-Fi, mobile & Bluetooth or Reset network settings
  3. Confirm the reset
  4. Restart your phone
  5. Wait a few minutes for the phone to reconnect to the network
  6. Re-enable VoLTE in Settings
  7. Check if VoLTE works (look for LTE/4G indicator during a call)

If VoLTE still doesn't work, contact Tele2 or Xiaomi support.

Decision Box – What to Do Next?

Still not working? Let's narrow it down:

  • ✓ SIM also fails to use VoLTE in a known-compatible phone? → Contact Tele2 (plan or provisioning issue)
  • ✓ SIM works elsewhere but not on your Xiaomi? → Device-specific issue (continue troubleshooting above)
  • ✓ VoLTE option is missing? → Check plan support, ROM version, or try the hidden diagnostic toggle (Step 2)
  • ✓ Using an imported Xiaomi device? → Check compatibility (Step 4)
  • ✓ Nothing works? → Contact Tele2 to check account provisioning and device compatibility

Contact Carrier (When Required)

Contact Tele2 Sweden if:

  • Your SIM has no VoLTE in other phones as well (plan or provisioning issue)
  • You've tried all steps above and VoLTE still doesn't work
  • You need to verify that your plan includes VoLTE
  • You need to check that your SIM and account are properly provisioned for VoLTE

Tele2 Support (Sweden)

  • Call 90 222 from your Tele2 phone
  • Tele2 Help Centre: tele2.se/support
  • Tele2 App: Mitt Tele2 (available on Google Play Store)

Contact Xiaomi EU Support if:

  • You've tried all steps above and VoLTE still doesn't work
  • You've tested your SIM in another phone and it works normally
  • Your device is a European/Global variant but VoLTE still fails
  • You suspect a software or hardware issue with your device

Xiaomi EU Support

Final Verdict

If your Xiaomi won't use VoLTE on Tele2 Sweden, start by testing your SIM in another phone – this is the quickest way to determine if the issue is your device, your SIM, or your plan. If the SIM works normally elsewhere, enable VoLTE in Settings and note that on some Xiaomi dual-SIM devices, VoLTE availability may depend on which SIM is selected for mobile data. If the VoLTE option is hidden, use the Xiaomi diagnostic code *#*#86583#*#* to toggle the carrier check, which may make the VoLTE setting available. Tele2 has specific device compatibility and IMS provisioning requirements, and some Xiaomi models, especially imported variants, may not be fully compatible. You can also check IMS registration status using *#*#4636#*#* to confirm whether the phone is properly registered for VoLTE on Tele2's network. If all else fails, check for system updates and then reset network settings. Contact Tele2 to verify your account provisioning if none of these steps resolve the problem.

Frequently Asked Questions

Does Tele2 Sweden support VoLTE on Xiaomi?

Yes, Tele2 generally supports VoLTE on compatible Xiaomi devices, but compatibility can depend on the device model, software/firmware, and carrier provisioning. European/Global models may work, but imported China or India variants are more likely to have issues.

Why can't I find the VoLTE option on my Xiaomi?

If the option is missing, the VoLTE carrier check may be blocking it. Dial *#*#86583#*#* to toggle the carrier check, which may make the VoLTE setting available.

What is the Xiaomi VoLTE carrier-check code?

Dial *#*#86583#*#* in the Phone app to toggle Xiaomi's VoLTE carrier check on supported devices. It does not activate VoLTE on your Tele2 account.

How do I check if my phone is using VoLTE during a call?

During a call, if the phone remains connected to 4G/LTE instead of falling back to 2G/3G, VoLTE is likely active.

Why might some imported Xiaomi devices have VoLTE issues on Tele2?

Tele2 has specific device compatibility and IMS provisioning requirements. Imported devices may not be fully compatible with Tele2's network requirements for VoLTE.

Do these fixes work on EU Xiaomi devices?

The general troubleshooting steps apply to Xiaomi, Redmi and POCO phones in Sweden and the EU, although menu names and available options can vary by model and software version.

Note: This guide is updated for 2026. Menu names may vary slightly between HyperOS and MIUI versions. VoLTE availability depends on your specific Tele2 plan and device model.

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