title: FirebaseCrash symbol files and UUIDs
body: <p>Preface: I am not an iOS developer and relevant documentation is scarce, so I may be missing something that should be obvious.</p>
  
  <p>My team is building a Firebase app for iOS in Swift and we're getting crash reports in the console with obfuscated stack traces. The provided instructions to upload symbol files don't seem to be correct - the command as written returns an error about missing service account, and after we figured that one out it gave more warnings that we didn't decypher - but we managed to configure automatic upload and then rebuilt the latest release.</p>
  
  <p>Now I see that a handful of UUIDs (presumably the phones/sims that we've run that rebuilt version on?) have uploads associated with them, but none of them match the reports we've received. What I don't understand is how we're supposed to generate symbol files for the rest of the UUIDs. Am I correct in understanding that a UUID refers to a specific device, and any given symbol file will match only a single build and UUID? We don't have access to the devices that are reporting these crashes; that's why we're relying on the console instead of debugging them in Xcode. If you only get the correct symbols for the devices that you physically connect to Xcode when you make the build, what's the point of getting the stack traces online?</p>