Unveiled on Monday this week, Mviva, in which AOL has a 15 per cent stake, will offer e-commerce and content from 50 partners - half of them UK-based.
The UK partners include finance-related companies Abbey National, AFX News and TD Waterhouse; sports-related sites CricInfo, Eurobet and Sports.com; and travel information providers CitiKey, IT IS, LeisureHunt and Sandstone.
Mviva will be available through The Carphone Warehouse's UK stores next month before rolling out across Holland, France, Spain and Sweden over the summer.
Other UK partners are kids' sites Cartoon Network and Fox Kids; classified ads providers Loot.com and Yell; and entertainment-related sites Gameplay, nGame and SceneOne.
Also present on the portal are eBay, lastminute.com, ebookers.com, Boxman.com, CNN Mobile, gift site Codygifts.com, online diary service mdiary and internet messaging service mmail.
The Carphone Warehouse is expected to announce a second wave of partners from across all five countries in the next six weeks.