... if you haven't done so already. Make sure it's an online backup. Go into "Options" -> "Change Devices" and set up your transfer code. Take a screenshot of it. upload it to the Internet. Email the screenshot to yourself, or have it backed up on Dropbox or your device's cloud backup system. There are many horror stories of people having no transfer ID, or their transfer ID is stored on their device, which they can't access, or they WROTE DOWN their transfer ID, then couldn't read it. --- Rooted Android and non-rooted iOS < ~8.4 can back up the savedata.bin file, which holds your account info. Non-rooted Android can back it up, but may require root to load it. For iOS < ~8.4, you can use a tool like iFunBox to browse the app's stored files from your computer. For iOS ~8.4+, Apple disabled app data browsing. Anything you see that tells you otherwise is probably a virus. Set up your transfer ID even if you do the savedata.bin backup. Due to the above caveats, it's easier to use a transfer code than to load savedata.bin.