Low-band networks are expanding into almost everywhere; IoT is seeing rapid progress; 2G and 3G are gradually retiring; VoLTE adoption is accelerating; and NB-IoT has been incorporated as part of 5G specifications. These developments, along with many others, are stimulating the comprehensive enhancement of voice and IoT, which contributes to the advancement of 5G network construction. In her speech titled "Ubiquitous Low-Band Coverage for Accelerated Full-Service Growth" at the MBBF 2020, Mrs. Shen Shaoai, Consultant of China Telecom's Science and Technology Innovation Department, said that coverage is always the most crucial in the development of mobile IoT. Providing a higher coverage of 11 dB over the 1800 MHz band, the 800 MHz band is widely regarded perfect for wide-area and in-depth urban coverage. Utilizing this band's advantages, China Telecom became the first carrier in China to build low-band LTE networks nationwide, with 460,000 base stations. Delivering excellent coverage has provided a strong support for NB-IoT and VoLTE development. China Telecom has commercially launched 5G SA across over 300 cities in China, driving 2G and 3G-based IoT and voice services to quickly migrate to 4G and 5G networks.