EE now has 9.3 million 4G customers, expecting to reach 14 million by the end of the year.
The mobile operator's 4G base grew 200 per cent year-on-year, adding 1.7 million new customers in the first three months of 2015.
This news comes after the company demolished last quarter's 4G sign-up target of 6 million, reaching 7.7 million customers at the end of 2014.
EE also believes it'll be able to hit its 14 million goal, claiming that 95 per cent of new customers use its 4G network, and almost 50 per cent use the company's proprietary double-speed 4G.
Similar targets have also been set in other areas. As part of a three-year investment programme, the company will be spending 1.5 billion in order to provide 99 per cent of the population with 4G coverage. This will be building on the company's existing figure of 87 per cent.
Despite a one per cent year-on-year drop in operating revenue to 1.5 billion, the report will likely please prospective owner BT.
The telco is set to buy EE for 12.5 billion, subject to anti-competitive regulatory approval.
EE's expanding customer base will give BT a strong framework to utilise if and when it takes over.
Also highlighted in the report was the trial launch of Europe's fastest 4G, with speeds of up to 400Mbps. The company plans to follow up this development with research into Voice Over 4G, seamless Voice over Wi-Fi and micro-network technology'.
