A is a JavaScript file used by browsers to decide which proxy server to use for a given URL. It is not a phone-specific file type like a firmware or flash file, but rather a configuration script used on PCs or enterprise networks — or rarely, configured manually on some Android devices for Wi-Fi proxy settings.
The is typically a model number for a budget or feature phone (often a Nokia C or G series, depending on region). nokia ta-1352 pac file