Thousands of O2 and Sky Mobile customers across Britain have reported issues with signal and network access tonight.
Customers from across the UK took to social media to demand answers from the networks.
There were a total of 339 reports of outages from O2 customers earlier this evening, with a massive 1,244 Sky customers reporting issues.
Sky tweeted: "We are aware that some Sky Mobile customers are experiencing intermittent issues with their service right now. We are investigating the issue and we are sorry for any inconvenience this may be causing."
As the reported Sky Mobile network issues struck users took to sites such as Twitter to discuss the problems they were facing.
One tweeted: "@SkyHelpTeam is Sky mobile down? No service!"
Another posted: "@SkyHelpTeam I have no service, I can’t make calls and have no internet connection??"
Sky Help Team Twitter account said a fix is in the works for the problems affecting mobile users today.
The account tweeted: "We're sorry for the issue, our teams are aware and are working on a fix."
At the time of writing, Down Detector UK has recorded a peak of over 1,400 reports of Sky down, reports the Express.
According to the site's stats, the areas where the most amount of Sky Mobile down reports are coming from include Birmingham, Glashow, Liverpool, London, Manchester and Sheffield.
Down Detector is an independent outage monitor which tracks social mentions to detect the moment popular services are taken offline.
