AvNexo

 Voice over LTE ( VoLTE ) is a modern telecommunication technology that transforms traditional voice calls into digital data packets transmitted over LTE networks. Unlike standard 2G or 3G calls that rely on analog voice channels, VoLTE delivers HD-quality voice, faster connections, and improved network efficiency . For Xiaomi users — whether you own a Redmi Note 8 Pro , Xiaomi Mi A2 , or any other Xiaomi, Redmi, or POCO device — enabling VoLTE enhances your calling experience while maintaining reliable internet connectivity. This guide explains what VoLTE is, how it works on Xiaomi devices, how to activate it, and the benefits you’ll notice immediately after enabling it. Did you know? For a complete guide on this topic, check out the Xiaomi Learning Hub and explore related tips in the Connectivity & Network Topic Hub. 🔹 What Is VoLTE and How Does It Work? VoLTE stands for Voice over Long-Term Evolution . In simple terms, it allows voice calls to be transmitted a...

Tesco Mobile VoLTE Not Working on Samsung in the UK: What Actually Fails Behind the Scenes When VoLTE stops working on Tesco Mobile on a Samsung phone, it rarely announces itself clearly. Calls still go through. Signal bars still look fine. But something feels off: calls take longer to connect, data pauses when a call starts, or the phone silently drops back to 3G. This is a Experience-Driven breakdown, because Tesco Mobile VoLTE issues on Samsung only really make sense once you observe how the device behaves before, during, and after calls — not just what the settings claim. What Samsung Users Mean by “VoLTE Not Working” In real usage, Tesco Mobile VoLTE problems usually show up as behaviour changes rather than error messages: 4G drops to 3G the moment a call starts Calls take several seconds to connect Mobile data pauses during calls No VoLTE or HD icon appears, even in strong signal areas Samsung doesn’t warn you that VoLTE failed. It just quietly falls bac...

  🔹 What Is VoLTE? VoLTE (Voice over LTE) is a communication technology that routes voice calls through your 4G or LTE data network , instead of the old-fashioned 2G/3G voice channels. When VoLTE is active on your Xiaomi, Redmi, or POCO device, your voice is digitized and sent as data packets. This leads to clearer calls, faster connections, and better overall performance. Did you know? For a complete guide on this topic, check out the Xiaomi Learning Hub and explore related tips in the Connectivity & Network Topic Hub. 🔹 How Does VoLTE Work? Traditional mobile calls use circuit-switched networks that max out around 8 Kbps , but VoLTE compresses and transmits voice data at up to 13 Kbps . That means: Sharper, high-definition sound Near-instant call setup Stable voice quality, even in low-signal areas Unlike VoIP services such as WhatsApp or Skype, VoLTE doesn’t rely on third-party apps and uses less battery power because it’s built directly into the ...

What Happens When UK Mobile Networks Shut Down 3G? (Full Guide 2025) The UK is in the middle of a major network transition: all major operators — including EE, Vodafone, O2, and Three — are shutting down their 3G networks to free up spectrum for faster 4G and 5G services. If you’re still using older devices or rely on 3G in certain areas, you might be wondering what this actually means for you. Here’s a clear, practical UK-focused breakdown. Why Is 3G Being Shut Down in the UK? Improved speed & capacity: 4G and 5G are far more efficient, giving better coverage and faster data. Energy savings: 3G technology uses more power, so shutting it down cuts network energy consumption. Spectrum re-use: Operators can repurpose old 3G frequencies to strengthen 4G and 5G. Lower maintenance costs: Supporting multiple legacy networks is expensive and unnecessary today. When Will the UK 3G Shutdown Happen? Each operator has its own timetable. ...

SMARTY Mobile Call Quality Problems: Why Calls Drop or Sound Bad Reality check: what users assume Many SMARTY users in the UK assume that poor call quality is always a SIM or phone fault. “Signal is full, why is my call cracking or dropping?” Frustration builds quickly — people restart devices, swap SIMs, or blame the network blindly. It feels logical. It is also usually wrong. Call problems often stem from hidden network behaviour, software quirks, and environmental factors, not faulty hardware. What actually breaks most often The three primary causes of poor call quality on SMARTY are: low-priority MVNO traffic, VoLTE and Wi-Fi calling misconfigurations, and local interference inside homes or offices. Even with full bars, calls can degrade unexpectedly. 1) Low-priority MVNO traffic SMARTY runs on Three’s network as a Mobile Virtual Network Operator (MVNO). During peak hours, calls from SMARTY users can be deprioritised, causing dropped calls or degraded au...

Call Audio Distorted in London Underground – Causes & Fixes Users in London frequently report distorted or low-quality call audio when travelling through the Underground. The distortion may include muffled voices, crackling sounds, or occasional one-way audio. While this problem is location-specific, it is usually not a hardware fault. Instead, it stems from mobile network transitions, underground signal infrastructure, and the way smartphones handle VoLTE and Wi-Fi Calling in challenging environments. Why Call Audio Becomes Distorted Underground Several factors contribute to audio issues in the London Underground: Rapid network handovers: Phones switch between surface 4G/5G coverage and underground signal repeaters or Wi-Fi networks provided by operators like EE, Vodafone, or O2. Limited signal strength: Tunnels and deep stations weaken LTE signals, causing phones to reduce call bandwidth or switch to emergency fallback modes. VoLTE/VoWiFi transitions: Some call...

SMARTY Mobile on Samsung Phones: Compatibility, Issues, and Fixes (UK) There’s a popular assumption floating around UK tech circles that you slap a SMARTY SIM into any Samsung phone and everything just works. It’s the kind of “obvious truth” that feels safe to repeat on forums and comment threads — but it isn’t. In reality, compatibility with Samsung devices isn’t seamless for everyone, and a few predictable break points trip up a surprising number of users. I’m going to take a clear stance: SMARTY on Samsung phones is mostly compatible, but it breaks in specific, avoidable ways — and the online advice often gets this wrong. Reality Check: What Users Think Is Happening Most people in the UK think of SMARTY as “just another MVNO” like giffgaff or Voxi — they expect it to be plug-and-play on any handset. That belief rests on two assumptions: Samsung phones support all UK carrier features by default. SMARTY behaves identically to major operators (EE backend, same configs). ...

Poor Call Audio in Weak UK 4G Areas – iPhone/Samsung Users in certain UK locations frequently report poor call audio when their iPhone or Samsung device is operating on weak 4G coverage. Symptoms include muffled voices, one-way audio, or occasional dropped calls. This is especially noticeable in rural towns, older buildings, or fringe areas of city networks where LTE signal strength fluctuates. Why Weak 4G Causes Poor Call Audio Voice quality over 4G depends heavily on stable LTE coverage. When the signal drops: VoLTE (Voice over LTE) may degrade, reducing audio clarity The phone may switch between LTE and fallback 3G, introducing temporary audio distortion Background optimisation may pause call processing, causing one-way audio Even high-end devices such as iPhone 15 or Samsung Galaxy S23 can experience audio degradation under these conditions. UK User Observations AvNexo has noticed consistent patterns across different cities and carriers: EE users in Devon...

SMARTY Mobile on iPhone: Supported Models, Issues, and Settings (UK) There’s a quiet belief among UK iPhone users that MVNOs are easiest on Apple devices. Pop the SIM in, iOS does its thing, and everything just behaves. With SMARTY, that belief is only half true — and the half people don’t notice is where most of the friction lives. I’m taking a clear stance upfront: SMARTY works better on iPhones than on most Android phones, but it fails in more subtle, harder-to-diagnose ways — especially around voice features, plan recognition, and silent network downgrades. If you expect the iPhone to “just handle it”, you’ll misread what’s actually going on. Reality Check: What iPhone Users Think Is Happening Most UK iPhone users assume three things when switching to SMARTY: iOS automatically applies the correct carrier bundle VoLTE and Wi-Fi Calling are either on or off — clearly If data works, the plan is fully active That confidence comes from experience with EE, O2, or V...

If your iPhone 8 or iPhone 8 Plus keeps dropping calls on US Cellular in 2025, you're definitely not alone. Many users across the Midwest and rural regions where US Cellular operates have reported sudden call failures, network cuts after a few seconds, and weak signal performance — even in areas where coverage used to be stable. This guide gives you the fastest, most reliable fixes that actually work for US Cellular users. These steps are based on real-world troubleshooting patterns and common issues seen on older iPhones running iOS 16 and iOS 17. 1. Turn Airplane Mode On and Off This forces your iPhone to reconnect to the nearest US Cellular tower. Swipe down → toggle Airplane Mode on Wait 10 seconds Turn it off Call drops caused by temporary network handoff failures often get fixed instantly. 2. Reset Network Settings (Most Effective Fix) US Cellular sometimes updates local tower configurations, and older devices like the iPhone 8 may not adapt correc...

Samsung Call Drops or One-Way Audio – UK Guide Samsung users in the UK sometimes experience call drops or one-way audio, where one participant cannot hear the other. This issue often appears on EE, Vodafone, or O2 networks and can be intermittent, making troubleshooting tricky. Unlike hardware failure, these problems usually involve network conditions, VoLTE/VoWiFi handovers, or device settings that affect voice call stability. Why Calls Drop or Produce One-Way Audio The main causes include: Network handovers: Switching between 4G, 5G, or Wi-Fi during a call can disrupt audio or cause the call to drop. Signal strength fluctuations: Indoor locations, especially older UK buildings, can reduce LTE reception, leading to one-way audio. VoLTE or VoWiFi configuration: Misaligned or outdated carrier settings can affect voice routing. Device software: Background optimisations, battery saving, or corrupted cache can interfere with call processing. These factors often co...

If your iPhone is dropping calls on T-Mobile, AT&T, Verizon, or US Cellular, you’re not alone. In 2025, many users report call failures due to network changes, iOS updates, VoLTE issues, or simple device glitches. This guide walks you through real fixes that consistently work across all major U.S. carriers. 1. Toggle Airplane Mode (Fast Refresh) This resets your network connection without rebooting the phone. Swipe down from the top-right corner. Tap Airplane Mode → wait 10 seconds → turn it off. 2. Update Carrier Settings Carriers frequently push updates to improve 5G/VoLTE stability. Go to Settings → General → About . If a popup appears, tap Update . 3. Turn VoLTE / 5G On or Off Some regions and towers have unstable 5G or VoLTE coverage. Switching modes often stops call drops. Try these combinations: 5G Auto instead of 5G On. Switch to LTE only. Toggle VoLTE on/off (varies by carrier). 4. Reset Network Settings One of the most relia...

SMARTY Mobile on Motorola Phones: Known UK Issues and Solutions Motorola phones sit in a strange middle ground in the UK. They’re not niche like Xiaomi, not tightly controlled like iPhone, and not as heavily customised as Samsung. For many people, that sounds ideal — clean Android, decent radios, fewer gimmicks. That assumption mostly holds. But with SMARTY, it creates a specific kind of disappointment. I’ll be blunt from the start: SMARTY works acceptably on most Motorola phones, but the experience is inconsistent in ways that confuse users because nothing looks “wrong”. When problems show up, they rarely look like faults. They look like the phone being a bit slow, the network being a bit busy, or the user imagining things. That ambiguity is the real issue. Reality Check: What Motorola Users Think Is Happening Motorola buyers in the UK usually believe at least one of these: “Near-stock Android means fewer compatibility issues.” “If it’s sold unlocked in the UK, th...

iPhone Wi-Fi Calling Not Working on UK Networks (EE, O2, Vodafone) – Complete Fix Guide If your iPhone refuses to use Wi-Fi Calling on EE, O2 or Vodafone, you’re not alone. This feature is extremely useful across the UK — especially in rural England, Scottish Highlands, Welsh valleys, and concrete-heavy flats where indoor signal is weak. But Wi-Fi Calling is also one of the most temperamental iPhone features. Here’s a full UK-centric guide based on real issues I’ve faced with EE and O2 myself, plus what other network users commonly report. How Wi-Fi Calling Works on UK Networks Wi-Fi Calling lets your iPhone make and receive calls over Wi-Fi instead of relying on weak 4G/3G/2G signal. Unlike some other countries, UK operators implement their own server setups and requirements — so behaviour varies between EE, O2 and Vodafone. UK-specific quirks you should know EE requires VoLTE to be enabled before Wi-Fi Calling can activate. O2 is slow to switch to Wi-...

SMARTY Call Quality Problems in the UK: When Clear Signal Still Means Bad Calls Reality check: what users think You see full bars. You expect a crisp call. End of story, right? Wrong. Many SMARTY users assume that a strong signal guarantees clear voice calls. When calls drop, echo, or crackle, the instinct is to blame the phone: “This iPhone/Samsung must be faulty.” It feels logical. It is also usually wrong. This is where people usually go wrong. What actually breaks most often Call quality problems are rarely device failures. They are caused by the complex behaviour of the Three network under load and indoors, combined with how SMARTY traffic is prioritised. 1) Low-priority traffic SMARTY users sit at the lower end of the Three network’s priority stack. Even with a strong signal, during peak hours the network allocates bandwidth first to higher-tier customers. Calls from SMARTY can drop, distort, or fail to connect because the network deliberately limits capacity for lo...

Resolving Call Freezing Issues on O2 and EE for iPhone & Samsung in the UK Why Freezing Occurs During Calls iPhone and Samsung users across the UK frequently report screen freezes or unresponsive behaviour during calls on O2 and EE networks. This is especially common in London, Manchester, Glasgow, and Edinburgh, where high network traffic and indoor signal obstructions can combine with device processing limitations to cause temporary freezes. On a personal test with an iPhone 15 on O2 during a London commute, the device froze multiple times when switching between apps while on a call. Similarly, a Samsung Galaxy S23 on EE displayed temporary unresponsiveness when the call interface attempted to update contact or VoLTE data in real time. Environmental factors such as indoor signal-blocking materials, damp flats in Glasgow, and tunnels in London further exacerbate the problem. Common Mistakes UK Users Make Continuing Multi-Tasking During Calls Many users attempt to navigate ...