Carphone Warehouse’s trial run with Best Buy in the US appears to have been successful…“Up to 200 Best Buy stores will now play host to Carphone Warehouse-run “stores within a store” in the next 18 months”, reports The Register. On the other side of the pond Carphone plans to expand its Best Buy-inspired Geek Squad tech support visitors across the country from its trial in London.

• US Mobile Phone Retail War