O2 issues a new warning that could impact internet and messaging apps like WhatsApp for some users as the UK network, now under Virgin Media, prepares to phase out its older 3G technology in more locations. The 3G signal from O2 has already been terminated in several areas including Durham, Norwich, Telford, Guildford, Watford, and Torquay, with parts of Scotland next in line for the switch-off.
On November 5, 2025, when O2 deactivates 3G, users with 3G-only devices will lose access to data services, rendering tasks like sending emails, reading WhatsApp messages, and browsing websites without Wi-Fi impossible. Basic phone calls and SMS texts will remain functional, but data services will cease for these devices.
The initial phase-out of 3G will affect eastern regions of the UK, such as Aberdeen and Dundee, before expanding to cover the entire UK by the end of 2025. The move to retire 3G is driven by its outdated nature, high operational costs, and inefficient use of bandwidth compared to newer technologies like 4G and 5G, which offer significantly faster speeds.
Although the impact is expected to be minimal due to widespread adoption of 4G and 5G-capable devices, O2 is offering free 4G-ready devices to some 3G customers and discounted upgrades to others without compatible handsets or SIM cards. EE and Vodafone have already decommissioned their 3G networks to enhance network efficiency.
Virgin Media O2’s Chief Technology Officer, Jeanie York, emphasized the upcoming transition to 4G and 5G networks for improved performance and energy efficiency. Customers without suitable devices, especially in Scotland, are advised to upgrade promptly to avoid disruptions to mobile data services post the 3G shutdown. Direct communications will be sent to impacted users to provide guidance and support during the transition.