Mobile phone retailer Phones 4U, which has stores in Chelmsford, Braintree, and Brentwood, has gone into administration this morning (September 15).
The chain, which is owned by private equity firm BC Partners, has 5,596 employees in the UK and has said its 550 stores would all be closed today.
Phones 4U has blamed its current situation on mobile network EE's decision not to renew its contract.
Vodafone had previously decided not to renew their contract with Phones 4U earlier in September.
Phones 4U has said established mobile contracts taken out at their stores will not be affected.
Customer service lines:
Phones 4u Customer Service 0844 871225
Technical Support: 0844 8712233
Handset Repairs 0844 8712269
Phones 4u Care (Insurance) 0844 8710535
LIFE Mobile Customer Service 0844 3221133