O2 has begun the process of turning off its 3G network, which could affect thousands of mobile phone users across the UK. As part of a wider upgrade programme, the telecoms company is shifting its focus to its 4G and 5G networks to offer faster, more reliable services.
However, customers with older phones that do not support these technologies may be left without mobile data access. The 3G switch-off has already begun in Durham and is set to continue across the UK throughout 2025.
While this move will benefit most customers by enhancing 4G and 5G coverage, users who still rely on 3G may face significant disruptions unless they upgrade their devices.
The Impact on Mobile Users
O2‘s 3G switch-off is part of a broader industry-wide initiative aimed at phasing out older mobile networks in favour of newer, more advanced technologies.
According to O2, the majority of its customers already have 4G or 5G devices and will not be impacted by the change. However, a significant number of users with older handsets may find themselves unable to access mobile data once the 3G network is deactivated.
Customers without 4G or 5G-enabled devices will still be able to make voice calls and send text messages. However, they will lose access to mobile data services unless they upgrade to a 4G or 5G-compatible phone.
O2 has reached out to those most at risk of disruption, offering support and incentives to encourage upgrades. In Durham, where the switch-off has already started, the company is offering vulnerable customers discounted or free devices to ensure they can continue to access mobile services.
This shift has implications beyond everyday users. Older mobile devices, such as security alarms or payment terminals, also rely on 3G networks. According to O2, these devices will need to be upgraded to ensure they remain functional after the 3G switch-off.
Customers with such devices are advised to check with their service providers to ensure they can continue to operate after the network transition.
Supporting Customers Through the Transition
O2 has acknowledged the potential challenges posed by the 3G switch-off, particularly for vulnerable customers. The company has committed to providing additional support, including outreach efforts to those who may not be aware of the upcoming changes.
Jeanie York, Virgin Media O2’s Chief Technology Officer, stated, “By starting in just one location and by putting careful monitoring in place, we’ll minimise disruption to customers and ensure the success of this essential modernisation programme“
For those still using 3G-only devices, the company encourages upgrading to newer models that support 4G or 5G. Customers are also advised to enable Wi-Fi and 4G Calling on compatible devices to ensure a smooth transition and uninterrupted service.
According to the telecom company, switching off 3G will ultimately enhance customer experience by expanding the availability of faster and more reliable mobile networks.
As this transition continues, O2’s priority remains supporting customers through the process and helping them adjust to the upgraded network technology.
