What is the purpose of each radio frequency of a mobile phone?

Mobile phones operate across various radio frequencies to facilitate different types of communication. The primary purpose of these frequencies includes voice calls, data transmission, and text messaging, with specific bands allocated for 2G, 3G, 4G, and 5G services. Additionally, different frequencies are used for Wi-Fi and Bluetooth connections, enabling short-range data exchange and internet access. Overall, these frequencies allow mobile devices to connect to networks, access the internet, and communicate with other devices effectively.