Vodafone has avoided a fine from Ofcom after taking immediate action to increase its network coverage.
In November 2013, the communications regulator reported that EE, O2 and Three were meeting their 3G coverage obligations.
Under the terms of their spectrum use licences, it is stipulated that the broadband providers must offer at least 90 per cent network coverage in the UK.
However, Ofcom revealed that Vodafone - which was found to offer only 88.66 per cent coverage - was in breach of its licence.
The broadband provider was instructed to take action to meet its coverage obligations, or face a potential fine.
In response, Vodafone formulated a plan to upgrade 129 of its mobile transmitter sites by the end of 2013.
As a result of the recent infrastructure work, Vodafone is now offering 90 per cent coverage, and Ofcom is planning to take no further action.
The broadband provider said it was pleased to reach the required coverage level, and would now be focusing on its 4G mobile broadband rollout.
"We remain committed to delivering 98 per cent population coverage across 2G, 3G and 4G by 2015," Vodafone stated.
The company said it is investing more than £900 million in its network this year alone, in order to increase access to super-fast Vodafone services.