Altice Readying Bid for Portugal Telecom

The EU is investigating Amazon's tax arrangements in Luxembourg, suspecting illegal state subsidies. Altice is preparing a bid for Portugal Telecom, potentially breaking up its merger with a Brazilian carrier. Meanwhile, Rio Tinto has declined a merger proposal from Glencore, which aimed to form the largest mining company. Glencore has approached Rio Tinto's major investor, Aluminium Corp of China, to gauge interest in a potential deal.

What is Altice reportedly preparing to do in Portugal?

What was Rio Tinto's response to Glencore's merger offer?