Android users have been experiencing an error message known as “Error 504” for a while now. This error usually occurs when the user tries to access a website or app that is not available at the moment. There are a few things that you can do in order to fix Error 504 on your Android device. The first thing that you can do is to try and connect to Wi-Fi or 3G networks in order to try and access the internet. If you are still experiencing Error 504, then you can try and reset your Android device. Resetting your Android device will erase all of your data, so make sure that you backup any important files before you reset your device. If none of these solutions work, then you may need to contact Google support in order to get help fixing Error 504 on your Android device. ..