If the tool fails, you must enable Developer Options first. Here’s the trick:
The effectiveness of these tools is, however, a race against time and security patches. Samsung has consistently updated its firmware to close these loopholes. An FRP tool that works on a J5 2016 running Android 6.0.1 with an early security patch may be completely useless on a device updated to the final 7.1.1 Nougat release. This cat-and-mouse game means that most successful "tools" are actually multi-step procedures requiring specific firmware combinations, emergency dialer codes (like #0 #), or third-party applications like "Test DPC" to hijack the device administration settings. samsung j5 2016 frp unlock tool
If you do not have a computer, you can often bypass the lock by exploiting the device's setup wizard or accessibility features. If the tool fails, you must enable Developer Options first