已下是答复的部分: Data Routing Back to Home Network: Older Networks (2G/3G): In some cases, especially in older 2G and 3G networks, the data packets might be routed back to your home network's GGSN before going out to the internet. This was partly due to billing and data tracking requirements. Modern Networks (4G/LTE and Beyond): With advancements in mobile technology, especially with 4G/LTE and 5G networks, the need to route data back through the home network's GGSN has decreased. These networks often allow data to access the internet directly via the local network's gateway, improving efficiency and reducing latency.