Assuming you would like tips for downloading maps for hiking trails onto your phone:
One option for downloading maps to your phone is to find a website that offers trail maps, such as AllTrails. Once you find the map you want to download, tap on the “Download” or “Print” button. This will typically give you the option to either open the map in another app, such as Google Maps, or to save it as a PDF file. If you choose to open it in another app, make sure that app is downloaded and installed on your phone first. If you save it as a PDF, you can then email the file to yourself and open it on your phone using any PDF reader app.
Another option is to use an app specifically designed for downloading and viewing trail maps offline, such as Gaia GPS or Trailforks. With these apps, you can search for nearby trails and then download them directly onto your phone so that they’re available even when you don’t have cell service. These apps usually have other features as well, such as GPS tracking and routing options.