Nearly 100 Carphone Warehouse stores are to close this year as the high street continues to struggle.
Dixons Carphone said that it will shut 92 Carphone Warehouse standalone stores over the next 12 months as it grapples with changing consumer habits.
Hard-pressed consumers are holding on to older devices for longer and going "Sim-only", which have dented the group's performance.
However, the firm insisted that no jobs will be lost as staff will be offered the chance to move to larger outlets nearby.
New boss Alex Baldock, who replaced the long standing Seb James earlier this year, said: "Right now, with our international business in good shape, we're focusing early action on the UK.
"In electricals, we're focused on gross margin recovery. In mobile, we're stabilising our performance through improvements to our proposition and network agreements.
"In both, we'll work hard to improve our cost efficiency. We won't tolerate our current performance in mobile, or as a group. We know we can do a lot better."
The store closures will add to the pain on the high street, with Dixons Carphone adding its name to the long list of retailers - Carpetright, Mothercare, Byron and others - to have shuttered outlets in the face of falling consumer confidence.
Carphone Warehouse has a number of stores in Sheffield including sites on Fargate, Meadowhall and Ecclesall Road.