In fact, the process of activating developer options for Samsung phones is almost exactly the same, so if you use a Samsung phone, you may not need to refer to this tutorial to complete the activation of the developer option.
1. In the mobile phone into the desktop click "Set" open access, details as shown in the following figure.
2. Find "about the device" below the settings and then click on "About the device" to open the entry, details below
3. After "About equipment" we find "build number" connection Click 7 times, will prompt "developer mode is enabled."
4. Now that we have opened the Samsung E7009 Developer option, now we're going to go back and click on the "<" icon, "Developer Options".
Okay, after activating the developer option, we still can't connect to the computer, so we need to find the USB mode under the Developer option, and then we can select it.