O2 has joined Vodafone in publicly voicing its anger at Ofcom for giving Everything Everywhere provisional approval to rollout a 4G network this year.

The firm has said that Ofcom is contradicting itself by allowing EE to rollout 4G using its 1800MHz spectrum before its rivals. O2 believes this gives EE an unfair advantage which goes against Ofcom's aim to deliver a competitive market.

O2 said in a statement: " We are concerned that Ofcom's other proposal to allow one operator to launch 4G early on its existing spectrum is contradictory to its objective of delivering a competitive market environment with four competing players. This could expose the process to further risk of delay."

The statement commended Ofcom for originally stating that the UK must have a competitive market and would stop mobile operators making strategic moves in regards to spectrum allocation. However, in O2's opinion the recent decision giving EE the green light goes against this objective.

Vodafone's outburst earlier this week accused Ofcom of "taking leave of its senses". Ofcom is sticking to its principle that allowing EE to rollout 4G ahead of the rest will not risk distortion of competition.

Three is another major player in this area but has yet to comment on the issue. We are waiting to hear back from Three with its standpoint.