EE has its headquarters in London, England, as well as hubs in Bristol, Darlington, Sunderland, Greenock, Merthyr Tydfil, North Tyneside, Plymouth and Leeds.

T-Mobile's UK unit had its origins in Mercury Communications, formed in 1989, and Orange had launched its services in 1994 while under the ownership of Hutchison Whampoa.

The initial planning suggested a joint revenue of around £7.7 billion for 2008, with savings via synergies expected to total "over £445 million annually from 2014 onwards".

[13] In January 2011, Everything Everywhere and Barclaycard announced that they would be jointly introducing the UK's first contactless mobile payments system for consumers by early summer 2011.

The joint venture was designed to be a "single point of contact" for all those involved in increasing the adoption of NFC for mobile payments in the UK.

It was announced that he would leave his post on 31 August 2011 and would be replaced by Olaf Swantee, who had held the position of Executive VP of European Activities and Sourcing for France Télécom in addition to being a member of EE's board.

[17] Swantee is seen as having done an exceptional job in leading the group through the challenges of rebranding and the launch of a new technology, and was named the mobile industry's person of the year in 2013[18] as a result.

In November 2011, Everything Everywhere announced plans to cut a further 550 back office staff, with its sites in Bristol, Darlington, Hatfield, and Paddington affected.

Everything Everywhere announced on 22 August 2012 that it would introduce a third brand as part of a future 4G launch to sit alongside T-Mobile and Orange, and that Everything Everywhere would continue as the company's legal name.

It was also confirmed that all ex-T-Mobile and ex-Orange shops would be re-branded EE overnight, but mobile products would continue to be sold under those brands inside the stores.

[27] The change took effect on 5 November 2012 through a firmware upgrade that replaced the Orange branding with EE on customers' router web interface.

[29] In March 2014, EE began to phase out the T-Mobile and Orange brands in the UK, removing these products from their website and retail stores.

[43] EE has main offices in London, Bristol,[44] Darlington, Doxford, Greenock, Merthyr Tydfil, North Tyneside, Plymouth and Leeds.

[50] In November 2010, EE announced the opening of six "dual-branded" shops: three were led by T-Mobile and three by Orange, and each promoted the other brand's products.

[55] In January 2014, it was announced that EE would close a further 76 duplicated shops and there would be 50 new ones, including 30 franchise outlets, estimated to create 350 jobs.

This would create 400 jobs in Sainsbury's and Argos stores, and see the number of outlets reach close to 700, as part of its ambition to provide 95% of the population with access to an EE shop within 20 minutes' drive.

The technology was initially trialled on Orange's network in Bristol, Reading and Southampton, before it was expanded to the rest of the UK by the end of summer.

[71] 4G coverage was initially "switched on" in 11 UK cities; London, Bristol, Birmingham, Cardiff, Edinburgh, Glasgow, Leeds, Liverpool, Manchester, Sheffield, and Southampton.

[83] On 12 February 2016, EE announced that it had reached its 2015 targets to double the number of 4G users on its network to 14 million at the year's end and remains as Europe's largest 4G operator.

4G Calling was first available in London, Birmingham, Bristol, Manchester, Edinburgh, Glasgow, Belfast, Leeds and Newcastle, and has been switched on across the rest of the network since July 2016.

More than 600 sites across cities including London, Birmingham, Manchester, Edinburgh and Cardiff, will be upgraded with the latest 4G spectrum over the next six months, equipped with 'Cat 12' and 'Cat 16' modems which will provide better speeds and coverage and support next generation 'CAT 12' and 'CAT 16' smartphones.

[88][89] On 19 March 2018, it was announced that EE had filled 12,000 km2 (4,600 square miles) of mobile not-spots in the last 12 months as part of its 4G geographic reach strategy of 95% by 2020, currently 90%.

These sites are spread across cities including London, Birmingham, Manchester, Bristol, Exeter, Hull, Nottingham, Edinburgh, Glasgow, Cardiff and Belfast.

[98][99][100] In December 2024, EE switched off Smart Number for its users, stating that iCloud calling and watch functionality wouldn’t be affected by this change.

MBNL would become a 50:50 joint venture between Everything Everywhere and Three UK, with Orange contributing several thousand of its base stations for network sharing purposes.

Using an EE-branded set-top box, it offered standard Freeview channels through an aerial connection along with PVR features and catch-up TV services, competing against YouView.

EE began sponsoring the British Academy of Film and Television Arts awards in 2013, replacing its Orange brand.

The data included "gender, age, postcode, websites visited, time of day text is sent [and] location of customer when call is made".

Complaints against the UK's largest mobile operator related to topics ranging from line faults, service and provision issues to bill problems.

The scam messages contained a link to a fake EE website, encouraging them to enter their personal details and card number.