European mobile data traffic will triple by 2028 driven by the adoption of 5G and migration into 4G, which continue to put pressure on network investments, telecom industry group GSMA said on Thursday. The GSMA, which brings together more than 1,000 mobile phone operators and businesses, said 5G subscribers were interested in adding high-bandwidth services and content to their mobile contracts, as demand for high-quality gaming, extended reality, and video content grows.