According to both companies all new and existing contract customers of Vodafone and 3 will be offered the same pricing on and 3 mobile voice and data plans for the next two years if the merger is finalised.

For mobile phone and broadband pricing, both will not alter the ability for customers to acquire devices for $0 on 24-month contracts.

In February Vodafone announced it will form a 50-50 with Hutchison Whampoa, owner of the "3" brand, and offer services under the new name VHA which will begin trading mid-2009.

Nigel Dews, CEO of 3 and proposed CEO of VHA, said following the merger, Vodafone and 3 will remain "extremely competitive".

"We're happy to reassure our customers with a public commitment that if the merger proceeds as intended, no plan will be withdrawn from market for the next two years," Dews said.