An Access Point Name (APN) is a crucial component in connecting a mobile device to the internet. This article provides steps on how to check the APN information for a SIM card on an Android phone and how to configure the APN for GPS watches. To check the APN information, users should go to the “Wireless & Networks” or “Connections” settings on their Android phone, tap “Mobile network,” “Access Point Names,” and select the desired APN. The important information from the APN includes the APN name and MCCMNC. To configure the APN for GPS watches, users should send a SMS command with the APN information filled in, such as “pw,123456,apn,fast.t-mobile.com,,,310260#.” This article provides a simple and clear guide for setting up APN for GPS watches.