Xiaomi Cannot Register on Tre Sweden

Xiaomi Not Registered on Tre Sweden? Fix Emergency Calls Only & No Service (2026)

If your Xiaomi, Redmi, or POCO phone shows "Not Registered on Network", only allows emergency calls, or fails to connect to Tre (3) Sweden entirely, this guide covers common troubleshooting steps. This issue can occur across Sweden, from Stockholm and Gothenburg to Malmö, Helsingborg, and Uppsala.

Before You Start – Quick Checks

  • Toggle Airplane Mode – Turn on for 30 seconds, then off to refresh network registration.
  • Restart your phone – Clears temporary software glitches that may prevent network registration.
  • Check Tre network status – Visit Tre's Driftinformation page for any outages in your area.
  • Test your SIM in another phone – This is the quickest way to determine if the issue is your Xiaomi device or your SIM/account.

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 network registration issue:

  • Does the phone show "Not Registered on Network"? – This error means your phone cannot complete the registration process with Tre's network.
  • Can you make emergency calls only? – If only emergency calls work, your phone is not properly registered with Tre's network.
  • Do you see signal bars but can't register? – Signal bars only mean your phone detects a radio signal. Registration and authentication with Tre's network are separate processes.
  • Location-specific? – Does the issue occur everywhere or only in specific areas? Tre's coverage is typically excellent in Stockholm, Gothenburg, and Malmö.
  • Did it work before? – Did this issue start after a system update, SIM swap, or traveling abroad?

Why This Happens

  • Network operator selection issue – If your phone is set to manual network selection and cannot find Tre, it may fail to register.
  • SIM or account issues – Your SIM card may be faulty, not properly provisioned, or your account may have an issue.
  • 2G/3G shutdown and VoLTE blocking – Sweden is shutting down 2G and 3G networks. Tre may block devices that cannot support required emergency calling over 4G/VoLTE.
  • Device compatibility – Some regional variants of Xiaomi phones may support fewer Tre LTE bands, which can affect coverage quality.
  • Network mode mismatch – If your phone is locked to a specific network mode in an area without coverage, it may fail to register.

Check Network Status (Tre Sweden)

Before troubleshooting your device, verify Tre's network status:

  • Check Tre's Driftinformation page for planned maintenance or outages in your area.
  • Tre coverage maps show network availability across Sweden. Coverage is typically strongest in city centres like Stockholm, Gothenburg, and Malmö.
  • If there is a confirmed outage, network registration may be restored automatically within a few hours.

Tre Network Notes (Sweden)

  • LTE (4G) bands: B1 (2100 MHz), B7 (2600 MHz), B20 (800 MHz), B38 (TD 2600 MHz).
  • 5G NR bands: N1 (2100 MHz), N38 (2600 MHz), N78 (3500 MHz) – primary 5G band.
  • 2G/3G shutdown: Tre is shutting down 2G and 3G networks. Phones without VoLTE emergency call support may be blocked.

Step 1: 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/account.

  • Insert your Tre SIM into another phone (preferably a recent model).
  • Check if the phone registers on the network and can make calls.
  • If the SIM works normally on the other phone, the issue is likely with your Xiaomi device – continue with the steps below.
  • If the SIM also fails on the other phone, the problem is likely with your SIM or account – contact Tre.

If the SIM works normally in another phone, continue with Step 2.

Step 2: Check Network Operator Selection

Why this matters: If manual network selection is configured incorrectly, the phone may fail to register on the selected network.

  • Settings → SIM cards & mobile networks
  • Tap your Tre SIM
  • Tap Network operators
  • Select Choose automatically (if currently set to manual)
  • Wait for the phone to register on Tre's network
  • Check if the "Not Registered on Network" error disappears

If the phone still cannot register, move to Step 3.

Step 3: Check Network Mode

Why this matters: If your phone is locked to a specific network mode (e.g., 5G only) in an area without coverage, it may fail to register.

  • Settings → SIM cards & mobile networks
  • Tap your Tre SIM
  • Tap Preferred network type
  • Select an automatic option that includes LTE/4G, such as 5G/LTE/3G/2G Auto or 4G/LTE preferred
  • Wait 30 seconds and check if the phone registers

Note: If the phone registers on 4G but not 5G, the issue is likely 5G-specific. You can continue using 4G while troubleshooting 5G separately.

If registration still fails, move to Step 4.

Step 4: Check Device Compatibility

Why this matters: Not all Xiaomi devices support all of Tre Sweden's frequency bands. This is particularly important for imported variants designed for other regions.

Check your device model:

  • Tre Sweden uses LTE bands B1 (2100 MHz), B7 (2600 MHz), B20 (800 MHz), and B38 (TD 2600 MHz).
  • European/Global variants – Generally support most of these bands.
  • Imported variants – Some regional variants of Xiaomi phones may support fewer Tre LTE bands.
  • 5G support on imported variants – Many imported Xiaomi models may have limited 5G band support.
  • Band 20 (800 MHz) is used by Tre for better coverage – If your device lacks B20, you may experience limited coverage in rural areas.

Important distinction:

  • No registration anywhere – This is more likely a SIM, account, or configuration issue, not a band compatibility issue.
  • Poor or limited coverage in some locations – This is more likely a band or coverage issue.
  • Missing LTE bands usually causes weak signal, slow speeds, or poor indoor coverage – not a complete failure to register on the network.

If your device is a European/Global variant and registration still fails, move to Step 5.

Step 5: Check 2G/3G Shutdown & VoLTE Eligibility

Why this matters: This is a Tre-specific issue that can cause complete network registration failure. Sweden is shutting down 2G and 3G networks. Tre may block devices that cannot support required emergency calling over 4G/VoLTE.

Important dates:

  • December 1, 2025 – Some phones with the most serious safety issues were blocked.
  • February 2, 2026 – All affected phones must be blocked.
  • Telia's 2G network will remain until 2027, but Tre does not have access to it for regular calls.

Which phones are affected?

  • Older 4G phones that use 4G only for data, while calls go over 2G or 3G.
  • Phones that have 4G/VoLTE but do not support emergency calls over VoLTE.
  • These phones may be completely blocked – no calls, SMS, or data.

Important note: Tre blocking mainly affects devices that cannot support required emergency calling over 4G/VoLTE after legacy networks are reduced. A phone having VoLTE settings alone does not guarantee compatibility; the carrier must also support the device profile. Xiaomi phones often have VoLTE profile/carrier configuration issues that can affect compatibility.

How to check if your phone is affected:

  1. Check if your phone model is on Tre's affected list – Tre should have contacted affected customers.
  2. Test your SIM in another phone – If the SIM works in another device, your phone may be blocked.
  3. Check VoLTE support – Go to Settings → SIM cards & mobile networks → Your Tre SIM and see if VoLTE is enabled.

What to do if your phone is affected:

  • If your phone is blocked, you need to replace it with a phone that supports VoLTE emergency calls.
  • Alternative option: Switch to Telia, which still has 2G until 2027.
  • Check for a system update – Some phones may have received updates to enable VoLTE support.

If your device is not affected by the blocking and registration still fails, move to Step 6.

Step 6: Check Dual SIM Settings

Why this matters: Many Xiaomi users use two SIM cards. Dual SIM configurations can sometimes cause network registration issues.

  • If you use two SIM cards, disable the second SIM temporarily
  • Make Tre the preferred SIM for calls and mobile data
  • Restart the phone
  • Check if Tre registers on the network

If registration still fails, move to Step 7.

Step 7: 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 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. Give the phone a few minutes to reconnect to the network
  6. Check if the phone registers on Tre

If registration still fails, move to Step 8.

Step 8: Check for System Updates

Why this matters: Software updates often include modem firmware improvements that can resolve network registration issues.

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

If you're already on the latest version and registration still fails, move to Step 9.

Step 9: Check APN (Only if Data Fails After Registration)

Why this matters: APN settings affect mobile data connectivity after the phone has registered on the network. They normally do not determine whether the phone can register on Tre's radio network. Only attempt this step if your phone can make calls but cannot access mobile data.

Standard Tre Sweden APN settings:

  • APN: internet or data.tre.se
  • Username: (leave blank)
  • Password: (leave blank)
  • APN type: default,supl
  • APN protocol: IPv4/IPv6

Note: Some sources suggest bredband.tre.se as an alternative APN, but data.tre.se or internet is typically used for regular phone use.

  1. Settings → SIM cards & mobile networks → Access Point Names
  2. Tap the menu icon (three dots) and select Reset to default
  3. If that doesn't work, manually create a new APN with the settings above
  4. Restart your phone and test data connectivity

If registration still fails or data is still not working, contact Tre or Xiaomi support.

Decision Box – What to Do Next?

Still not working? Let's narrow it down:

  • ✓ SIM fails in another phone? → Contact Tre (SIM or account issue)
  • ✓ SIM works elsewhere but not on your Xiaomi? → Device-specific issue (continue troubleshooting steps above)
  • ✓ Phone was working before and stopped after network changes? → Check VoLTE compatibility (Step 5)
  • ✓ Phone shows signal but cannot register? → Check network mode and operator selection (Steps 2 & 3)
  • ✓ Calls work but data doesn't? → Check APN settings (Step 9)
  • ✓ Using dual SIM? → Try disabling the second SIM (Step 6)

Contact Carrier (When Required)

Contact Tre Sweden if:

  • Your SIM fails to register on other phones as well (SIM or account issue)
  • You've tried all steps above and registration still fails
  • You need a new SIM card
  • You need to check if your phone is affected by the 2G/3G shutdown blocking
  • You need to check your account status

Tre Support (Sweden)

Contact Xiaomi EU Support if:

  • You've tried all steps above and registration still fails
  • You've tested your SIM in another phone and it works normally
  • Your device is a European/Global variant but network registration fails
  • You suspect a hardware fault with the cellular antenna or modem

Xiaomi EU Support

Final Verdict

If your Xiaomi cannot register on Tre Sweden, start by testing your SIM in another phone – this is the quickest way to determine if the issue is your device or your SIM/account. If the SIM works elsewhere, check that your phone is set to automatic network selection and that the network mode is set to an automatic option like 5G/LTE/3G/2G Auto. Consider whether your device is an imported variant that may lack Tre's frequency bands – but note that band compatibility primarily affects coverage quality, not complete registration failure. The most Tre-specific factor is the 2G/3G shutdown – Tre may block devices that cannot support required emergency calling over 4G/VoLTE. A phone having VoLTE settings alone does not guarantee compatibility; the carrier must also support the device profile. If the issue persists, reset network settings or check for system updates. APN configuration is relevant only after the phone has registered on the network – it does not cause registration failure. Contact Tre to verify your account and SIM provisioning if none of these steps resolve the problem.

Frequently Asked Questions

Why does my Xiaomi show "Not Registered on Network" on Tre Sweden?

This error is commonly caused by manual network selection misconfiguration, SIM/account issues, or device compatibility problems with Tre's frequency bands. Additionally, Sweden's 2G/3G shutdown means Tre may block phones that cannot make emergency calls over 4G/VoLTE.

Why does my Xiaomi show signal bars but says emergency calls only on Tre?

Signal bars only mean your phone detects a radio signal. Registration and authentication with Tre's network are separate processes. This can happen due to network mode mismatch, SIM/account issues, or VoLTE blocking.

What frequency bands does Tre Sweden use?

Tre Sweden uses LTE B1 (2100), B7 (2600), B20 (800), and B38 (TD 2600) for 4G. 5G bands include N1 (2100), N38 (2600), and N78 (3500).

Why does my Tre SIM work in another phone but not my Xiaomi?

This indicates a device-specific issue. It could be due to network mode settings, device compatibility with Tre's frequency bands, or the 2G/3G shutdown device blocking.

Does Xiaomi work with Tre Sweden?

Most European/Global Xiaomi models work with Tre Sweden. However, imported China or India variants may lack frequency bands like B20 (800 MHz) and may not be fully compatible with the network.

Why does my Xiaomi work with other Swedish carriers but not Tre?

This can happen due to several Tre-specific factors: different LTE band usage, VoLTE profile requirements, device approval processes, or the 2G/3G shutdown device blocking. Tre's network configuration is different from other carriers like Telia or Tele2.

What is the 2G/3G shutdown and how does it affect my Xiaomi?

Sweden is shutting down 2G and 3G networks. Tre may block phones that cannot make emergency calls over 4G/VoLTE. Affected phones may be completely blocked from the network.

What APN settings does Tre Sweden use?

Tre Sweden uses APN internet or data.tre.se with no username or password. APN only affects mobile data after registration, not the registration process itself.

Note: This guide is updated for 2026. Menu names may vary slightly between HyperOS and MIUI versions. Network registration issues can be caused by multiple factors; try the steps in order until the problem is resolved.

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