Sure says there might be disruption to its mobile network overnight on Sunday.
It's as upgrades are carried out in preparation for the introduction of 5G later this year.
The telecoms company texted users to warn there could be temporary interruptions to phone coverage between 10pm on Sunday, July 12 and 8am on Monday, July 13.
It describes the work as a major milestone in transforming its mobile network, which will bring stronger coverage.
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