🧧Introduction :
Sony Xperia 1 IV Signal Issues : Sony Xperia 1 IV (EU) is the latest in the line model from Sony designed for creators, enthusiasts. With a 4K display, pro camera system, hardware and software improvements, it is a multimedia powerhouse.
However, even with premium hardware and a solid name worldwide, some users in Europe complained of network related issues including mobile data disconnects, poor signal strength, VoLTE/VoWi-Fi issues, roaming peculiarities, and LTE/5G volatility.
In this guide we’ll cover:
👉 What network issues users are facing.
👉 Why these problems occur.
👉 Step-by-step solutions.
👉 Tips specifically for European networks.
👉 When to contact support.
If you’re experiencing network glitches on your Xperia 1 IV, this guide will help you diagnose and possibly fix them.
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Common Network Problems Reported by Xperia 1 IV Users :😲
Here are the most frequently reported network symptoms:
1. Weak or Fluctuating Signal Strength
- Users frequently say that the phone will display low bars or flicker for signals in places where other gadgets hold on to better signals particularly inside buildings, or on the edges of coverage areas.
2. Mobile Data Won’t Connect or Disconnects Frequently
- Some owners describe cases where they have signal bars but no mobile data access, or data disconnects without warning.
3. 5G / 4G Hand-Off Problems
- Some users are experiencing issues with their phones toggling between 5G and 4G which is most common in areas with weak coverage and results in slow speeds and dropped connections.
4. VoLTE / VoWi-Fi Issues
- The VoLTE and Wi-Fi Calling (VoWi-Fi) options contribute to call stability and coverage, particularly indoors. For a lot of Xperia 1 IV users these features either never turned on, or vanished without warning.
5. Roaming Problems When Travelling Across Europe
- Cross-border travel such as from Germany to France or Italy to Switzerland can occasionally result in the Xperia 1 IV having difficulty locking on to local networks, even with roaming turned on.
6. Slow Upload/Download Speeds
- In some cases, users notice that speeds on mobile data are slower than similar devices on the same network.
Why These Network Issues Happen :🤔
Network behaviour isn’t just about the hardware multiple layers interact to deliver seamless connectivity.
1. Carrier Frequency Band Differences in Europe
European carriers have big differences in their 4G/LTE/5G frequency usages.Even if the Xperia 1 IV is band compatible, performance will depend on:
- Which bands are used locally
- How dense coverage is in your area
- Carrier network prioritisation
For instance, one area may have extensive use of Band 20, while another is its top band for 4G traffic on Band 3 or Band 7.
Takeaway: Because carrier implementation differs, two phones that support the same bands may still differ in real-world network quality.
2. Modem Or Firmware & Software Updates
- Sony releases network, modem and OS updates over time. If you don’t have the latest firmware and network updates, your phone might not be able to communicate with carrier networks as well as it could. Typical update delays, especially on regional carrier models, may cause some weird behaviour.
3. VoLTE Or VoWi-Fi Provisioning
VoLTE and VoWi-Fi require:
- Carrier support
- Network provisioning on your account
- Correct APN and IMS settings
If any of these aren’t configured properly, voice/data hand-over may fail even when carriers technically support VoLTE/VoWi-Fi.
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4. Dual SIM / eSIM Complexities
The Xperia 1 IV supports dual SIM (physical + eSIM). With two active profiles, network selection and priority can sometimes conflict, especially if:
- Both lines are on different carriers
- One SIM expects VoLTE while the other doesn’t
- Data is set for one SIM but voice is set for another
This complexity can trigger network inconsistencies if settings aren’t aligned.
5. Roaming & Network Handovers
When roaming across borders, the phone searches for local partners in a larger pool of networks. If the carrier relationships aren’t fully optimised, this can result in:
- Slower data
- Failed registrations
- Repeated network searches
European roaming should be smooth, but uneven carrier provisioning can still cause hiccups.
6. Local Coverage Limitations
Sometimes network inconsistency is simply due to:
- Weak local coverage
- High congestion
- Physical obstructions
Modern phones will try harder to maintain connection, which can sometimes look like unstable signal.
Practical Fixes for Xperia 1 IV Network Issues :🔥
Here’s how to fix the most common problems step-by-step.
1. Restart Your Phone :
- A simple restart refreshes the modem and network services often solving intermittent drops.
2. Update Software & Carrier Settings :
Make sure you’re running the latest firmware and carrier configs:
- Settings → System → Software update → Check for update
Carrier update prompts (sometimes separate) may also appear if available.
3. Enable/Disable Airplane Mode :
- Turn Airplane mode ON for 10–15 seconds and then OFF.
- This forces a fresh re-registration with the nearest cell towers.
4. Reset Network Settings :
It removes stored network configurations (Wi-Fi, APN, Bluetooth) and resolves network-related problems in many cases:
- Settings → System → Reset options → Reset Wi-Fi, mobile & Bluetooth
You have to enter the Wi-Fi passwords again after that.
5. Check Or Update APN Settings :
Incorrect APN entries can cause mobile data problems.
- Settings → Network & Internet → SIMs → Access point names
Click Reset to default or manually enter carrier-specific values from your operator’s support page.
6. Manually Select Network Operator :
If automatic roaming is inconsistent:
1. Settings → Network & Internet → Mobile network
2. Tap Network operators
3. Turn off Automatic
4. Select your carrier manually
This often helps when the phone picks the wrong network partner.
7. Preferred Network Type (LTE / 4G Only) :
If 5G or auto mode is unstable:
- Settings → Network & Internet → Mobile network
- Preferred network type → 4G/LTE only
This keeps the data steady when 5G is spotty.
8. Turn On VoLTE / VoWi-Fi :
If your carrier allows it:
- Settings → Network & internet → SIMs → VoLTE & VoWi-Fi
- Turn on these features and reboot your phone.
Most European carriers offer VoLTE (e.g. Vodafone, Orange, Three, Deutsche Telekom, EE) Ensure that your account is provisioned for the service.
9. Test With Another SIM or eSIM :
- Sometimes a problem lies with the carrier. Try another SIM (or eSIM profile) and see if the behaviour is the same.
If another SIM performs well, it’s probably a carrier provisioning problem.
10. Reset APN and IMS Config (Advanced) :
On some Xperia models, advanced settings under:
- Settings → System → Developer options → Cellular network
Allow finer control over IMS (VoLTE) and APN behaviour. Only adjust these if you’re comfortable or guided by carrier support.
European Network Tips :🚀
1. Roaming Within the EU
- Thanks to EU roaming regulations, you should have cost-capped data and normal speeds across EU member states.
If roaming feels slow or unstable:
- Try manual network selection
- Check roaming data permissions under Mobile network → Data roaming
- Ensure your carrier supports VoLTE / VoWi-Fi abroad
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2. Coverage Changes Across Cities vs Rural Areas
- Urban centres usually have stronger 4G/5G coverage; rural or border regions may fall back to weaker bands which can affect perceived stability.
- Using LTE only in low-signal areas can conserve battery and improve consistency.
When to Contact Support :🚧
If your Xperia 1 IV continues experiencing network problems after trying all steps:
- Mobile data never connects
- VoLTE/VoWi-Fi never activates despite carrier support
- Consistent disconnects on all networks
- Persistent drops in signal even where coverage is good
Then contact:
- Your carrier support (for provisioning, APN/IMS issues)
- Sony Xperia support in your country (e.g., UK, France, Germany, Spain, Italy, Netherlands)
Official support can:
- Verify carrier settings
- Push new network profiles over the air
- Check for modem firmware updates
- Diagnose hardware antenna issues
Conclusion :🙌
Sony Xperia 1 IV is a beast of a flagship, with top tier hardware across the board, but like always when network behavior is concerned, your mileage may vary depending on carrier profiles, software versions, roaming conditions and local coverage, especially outdoors in Europe, considering the vastly differing network and frequency bands.
The majority of network issues can be resolved, or at least alleviated, through one or more of the following: software updates troubleshooting reset network settings management APN/VoLTE and play with network selection. If the issue occurs across carriers or in multiple regions, then professional support is probably your best bet.
🔗
”Sony Xperia 1 IV Official Page (Europe)“
“FAQ/s”😄
1 Q. Why is the Sony Xperia 1 IV losing signal in Europe?
Ans. The Sony Xperia 1 IV may lose signal in Europe due to incompatible network bands with local carriers, temporary network outages, or software glitches. Checking carrier settings and updating to the latest firmware usually fixes the issue.
2 Q. Is network drop common on Sony Xperia 1 IV in EU countries?
Ans. Some users in Europe report occasional network drops on the Sony Xperia 1 IV, especially in rural areas or with certain carriers. Most cases are software-related and can be resolved with updates or a network reset.
3 Q. How can I fix connectivity issues on Sony Xperia 1 IV in Europe?
Ans. To fix connectivity issues on the Sony Xperia 1 IV in Europe, reset network settings, update the software to the latest version, and ensure the correct APN settings for your carrier are applied.
4 Q. Can a software update cause Sony Xperia 1 IV network problems in Europe?
Ans. Yes, recent software updates may temporarily cause network glitches on the Sony Xperia 1 IV in Europe. Installing subsequent patches or performing a restart typically restores normal connectivity.