iTunes will detect a problem and offer to or Restore .
Here's a step-by-step guide to download and install iTunes, which includes the Flash Tool: itunes flash tool download
The iTunes Flash Tool is not a standalone software that can be downloaded separately. Instead, it's a part of the iTunes installation package. To access the tool, you'll need to download the latest version of iTunes from Apple's official website. iTunes will detect a problem and offer to or Restore