One iPhone led police to gang suspected of sending up to 40,000 stolen UK phones to ChinaSima KotechaSenior UK correspondentWatch: BBC News joins police officers on dawn raids targeting gang behind phone smugglingPolice say they have dismantled an international gang suspected of smuggling up to 40,000 stolen mobile phones from the UK to China in the past year.In what the Metropolitan Police says is the UK's largest ever operation against phone thefts, 18 suspects have been arrested and more than...