When Developer Mode doesn't appear on your iPhone running iOS 17, it can be really frustrating, especially if you're looking to test apps or advanced features. Besides the usual activation steps, I found that using a reliable system repair tool, like FoneTool Repair, can help resolve glitches that hide Developer Mode. Here’s what I recommend trying if Developer Mode is still missing after the update: 1. Restart your iPhone to refresh the system. 2. Go to Settings > Privacy & Security > Developer Mode and see if the option appears. 3. If you still don’t see it, run a standard repair using FoneTool Repair — select “iOS System Repair,” then “Standard Repair,” download the necessary firmware, and start the repair process. 4. After the repair is complete, you should be prompted to enable Developer Mode. Additionally, ensure your iPhone is updated to the latest iOS 17 version, as sometimes minor updates fix these bugs. From my experience, following these steps helped me unlock Developer Mode smoothly. If you rely on this feature frequently, keeping a trusted repair tool on hand can save a lot of time and hassle.