Britain's O2 says some customers struggling with voice calls
https://www.reuters.com/article/us-health-coronavirus-britain-o2/britains-o2-says-some-customers-struggling-with-voice-calls-idUSKBN214219
British mobile operator O2, owned by Spain's Telefonica, said it had received reports of some customers struggling with its voice network as Britons started working from home to avoid coronavirus.