Ericsson, Nokia, Sony, British Telecom, Oracle, and Cisco announce they won’t participate in MWC2021 this year. — Last month, the GSMA congratulated itself for MWC Shanghai’s success, the first physical event of its kind this year. While there were over 20,000 visitors at the show, almost 100% are living in China. Now, with only 13 weeks left until the official start of Mobile World Congress Barcelona, dark…