EE says it carried out further work overnight to fix a technical problem which left some customers unable to make or receive calls.
In the last 24 hours, hundreds of people who use the mobile provider have told the BBC they have experienced service issues.
It comes after thousands were left unable to make or receive calls earlier this week due to a technical issue which impacted both mobile and landline phones.
On Saturday, a spokesperson for BT - which owns EE - said the network was "running as normal" after maintenance was carried out last night, but that it was "monitoring" the situation.
The BBC's Your Voice, Your News continued to receive messages from readers on Saturday saying that they had experienced issues with their phone service.
