What if your supermarket also became your mobile provider. Well, that may just be about to happen. Lidl [music] is preparing to launch cheap mobile phone plans across multiple countries, becoming the latest challenger to traditional telecoms groups.[music] The German retailer told the FT it planned to expand beyond its existing markets in Germany, Austria, and Switzerland, where it already offers mobile services, to up to 30 countries, including the UK, US, [music] France, and Spain. The idea is simple. You ...