Carphone Warehouse provided details of its massive European expansion plans today with its partner Best Buy that will require an investment of £90 million ($154 million), reports the Times Online. The plan initially calls for building four to five big-box stores in the UK next year, but will expand to about 100 of the 30,000-square-foot Best Buy Europe stores over the next five years. There will also be a smaller format store, at 2,000 to 3,000 square feet that will be called “Wireless World”, which will sell TVs, gaming devices, alongside laptops with broadband cards, and smart phones, including BlackBerries, the iPhone and T-Mobile’s G1. The company will spend around £90 million, which breaks out to £20 million in the current financial year to next March, and £70 million in capital spending set aside for the following year.

The company said it is hoping that the economic downturn is “the best time” to launch, but that the roll-out can also be moderated to match the consumer slowdown. The plan is hoping to grow Carphone Warehouse’s revenues to £6.2 billion and earnings to £3.5 million by March 2013.

In May, Carphone sold half of its retail business, which includes 2,430 stores in Europe and the US, to Best Buy for £1.1 billion with the aim of building out 100 megastores across the UK and Europe. The first Best Buy stores were originally expected to open by year-end, but they have been pushed back by six months, the Times Online said.