O2 has issued a new warning that may impact internet and messaging applications like WhatsApp for some users. The warning comes ahead of the network’s plan to phase out its older 3G technology in more areas across the UK. Virgin Media, which now owns O2, has already deactivated O2’s 3G signal in several locations, including Durham, Norwich, Telford, Guildford, Watford, and Torquay, with parts of Scotland next in line for the switch-off.
Starting on November 5, 2025, individuals using 3G-only devices will no longer be able to access data services. This means services like sending emails, reading WhatsApp messages, and browsing websites without Wi-Fi will not be possible. However, basic phone calls and SMS texts will remain functional. The initial phase of 3G shutdown will affect eastern regions of the UK, such as Aberdeen and Dundee, with the complete transition expected to be finalized nationwide by the end of 2025.
The decision to turn off 3G stems from its outdated nature, dating back to its introduction in 2003. As an obsolete technology, 3G is inefficient, costly to maintain, and utilizes bandwidth that could be repurposed for more advanced 4G and 5G networks. Compared to the higher speeds offered by 4G and 5G, which can reach up to 100Mbps, 3G can only manage speeds around 3Mbps.
While the 3G phase-out may affect a minority of users, as most now own 4G or 5G-compatible devices, O2 is offering assistance to affected customers. Some 3G users are eligible for a complimentary upgrade to a 4G-ready device, while others can purchase a new device at a discounted rate. Networks like EE and Vodafone have already completed similar transitions to optimize network efficiency.
Virgin Media O2’s Chief Technology Officer, Jeanie York, emphasized the shift towards more advanced networks, highlighting the enhanced speed and reliability of 4G and 5G technologies. Customers without 4G or 5G devices, particularly in Scotland, are advised to upgrade promptly. Regardless of location, all users relying on 3G services must upgrade soon to ensure uninterrupted mobile data access post-3G shutdown.