Sure has completed its takeover of Airtel Vodafone.
The deal was approved by both Jersey and Guernsey's authorities.
Sure says it signals a £48 million investment in a 5G mobile network, and that islanders will benefit from faster speeds and greater coverage.
Sure Group CEO Alistair Beak called it an 'exciting day' for the future of Channel Islands telecommunications:
“We want existing and new customers to know that the large investment we’re making will lead to significant improvements to their connectivity, speeds and coverage, as well as value for money through innovative products and services.
"The new mobile network, complemented by our extensive fibre network, will mean we can stay ahead of future demand driven by our increasingly digital lifestyles.”
Airtel Vodafone staff have joined Sure.
As part of receiving permissions, Sure has committed to allowing Airtel Vodafone customers to continue on their existing plans for up to three years.
Initially, the two will continue two companies will continue to operate separately.
Sure has also made a deal with the CI Coop, which will launch Coop Mobile offering its own mobile services and pricing over Sure's network infrastructure to 'preserve competition and customer choice'.
Hospital looking for dementia patients' family and carers opinions
New course for potential election candidates
£75,500 raised in Jersey Christmas Appeal Charity Auction
Government to announce support options for carers
Drink driving can cause 'life-changing' consequences
Parked cars damaged in Victoria Avenue crash
L'Ecume II: Lewis Carr jailed for 20 months for fatal collision at sea
Guernsey's former Chief Minister admits making indecent images of children
