As mobile networks continue to evolve, the UK is undergoing a major shift: the shutdown of legacy 2G and 3G services. This transition marks a significant step toward modern, high-speed, and more energy-efficient mobile connectivity.
At the centre of this change is VoLTE — or Voice over LTE — a technology that allows traditional voice calls to be made over 4G networks.
In this article, we explain what VoLTE is, why 2G and 3G are being phased out, and how these changes affect individuals and businesses across the UK.
What Is VoLTE?
VoLTE (Voice over LTE) is a technology that enables voice calls to be transmitted over the 4G LTE data network rather than older, dedicated voice channels used in 2G or 3G networks.
Benefits of VoLTE include:
- Higher call quality (HD voice)
- Faster call connection times
- Better battery efficiency on supported devices
- Simultaneous voice and data usage (no dropping to 3G for calls)
- Future-ready for network upgrades
Unlike older systems, VoLTE treats voice like any other internet data, similar to how apps like WhatsApp or FaceTime work — but directly integrated into the mobile carrier’s network for seamless, high-quality voice.
Why Are 2G and 3G Being Switched Off?
Mobile network operators in the UK are decommissioning 2G and 3G networks to free up spectrum and infrastructure for 4G and 5G services. Maintaining legacy networks is costly and inefficient compared to newer technologies.
Key Dates in the UK
- 3G switch-off is scheduled to be completed by 2025
- 2G switch-off will follow, mostly by 2033, although some operators may shut it down earlier
Each major UK provider (EE, O2, Vodafone, and Three) has its own timeline, but all are aligned with government guidance and regulatory standards from Ofcom.
Who Will Be Affected?
🧑💼 Consumers
Older devices that don’t support VoLTE or 4G will lose the ability to make voice calls once 3G (and eventually 2G) is shut off. This includes:
- Basic feature phones
- Early-generation smartphones
- Certain imported or “grey market” devices
🏢 Businesses
IoT systems, security alarms, remote sensors, and older point-of-sale (POS) terminals that rely on 2G/3G mobile connections may stop functioning unless upgraded.
Sectors like healthcare, logistics, and transport are particularly affected due to embedded systems and legacy tech.
How to Prepare
1. Check Device Compatibility
Make sure your mobile device supports VoLTE (many post-2015 smartphones do). You may need to enable it manually in settings.
2. Upgrade Non-Compatible Devices
Older phones and IoT hardware will need replacing with 4G or 5G-compatible models that support VoLTE and fallback to newer standards.
3. Talk to Your Provider
Most carriers are offering early upgrade paths, SIM swaps, or guidance for business users to transition.
4. Audit Business Infrastructure
If you rely on 3G/2G for field equipment, tracking systems, or telemetry, consult an IT provider to assess and modernise your setup.
The Opportunity Behind the Switch-Off
While it may sound inconvenient, the sunset of 2G and 3G is part of a broader digital transformation in UK telecoms:
- Improved speeds and capacity for mobile broadband
- Lower latency for real-time communications
- Reduced energy usage by retiring inefficient technologies
- Network simplification, leading to fewer outages and better coverage
Forward-thinking businesses are using this opportunity to upgrade to cloud-connected, secure, and future-proof solutions — from smart buildings to mobile-first workplaces.
How FYDUS IT Solutions Can Help
At FYDUS IT Solutions, we help clients adapt to telecom changes with minimal disruption. Our services include:
- Device audits and mobile strategy consultation
- VoLTE-capable handset and SIM provisioning
- Migration planning for business-critical IoT or mobile infrastructure
- Secure mobile networking solutions for hybrid workers
Whether you’re a small business or a larger organisation, we can help you stay connected through the 4G/5G era and beyond.