O2 and Vodafone mobile customers have been warned of network issues today.
The tech giants will be carrying out essential maintenance work, which may affect services until 8 pm this evening.

The work is being carried out in in the EX4 neighborhood, which stretches across St Thomas, Redhills and Pennsylvania.
The news is expected to leave a sour taste in the mouths of O2 customers in capital city after recent complaints over the in the area.
The telecoms company, owned by Virgin Media O2, has previously responded to problems in the St Thomas area.
A message was sent to customers, which read: “To make our network more reliable, we’ll be starting essential works in the area.
“This may affect your services for a while. We know this isn’t ideal, but we aim to have you back online by 8pm on July 29.”
The message also included a link for users to track the progress of the work being carried out.
O2 blamed the ‘congestion’ in the region and has promised customers to improve its service.
And hopes that the latest maintenance work would bring improved 5G to the area have been squashed.
Signalchecker.co.uk reveals that Vodafone and O2 do not currently provide 5G mobile in the area.
Vodafone confirmed the work is not related to increasing 5G coverage.
A spokesperson for the company said: “Our team is undertaking essential site maintenance in this area.
“We encourage customers to sign up to Network Checker to receive status updates regarding network issues and planned work.”
5G is the fifth generation in mobile network technology and was launched across the UK in 2019 and 2020.
EE was the first company to launch commercial 5G and Vodafone followed shortly after, treating customers to the service in , , , , , and .
O2 rolled out its 5G service in October 2019 and covered Belfast, Cardiff, Edinburgh, London, Slough and Leeds.
Giffgaff, which uses O2’s infrastructure, only started offering 5G in January 2021.