https://www.techradar.com/news/phone-and-communications/mobile-phones/samsung-galaxy-s3-will-offer-faster-dc-hspa-3g-connectivity-1081334
Samsung Galaxy S3 will offer faster DC-HSPA 3G connectivity | TechRadar
May 21, 2012 - Dual-channel 3G can bring speeds of up to 42Mpbs
samsung galaxy s3dc hspaoffer