Note: Samsung mobile phone to open the USB mode can not be closed, if you want to close only to restore the factory set up, or you can not shut down of course, to restore the factory settings must be back up the data, so that the data is lost after the original data can be restored OH.
1. Under the Standby page, click "Application".
2. Click the "Set" option and click on it to open the entry effect as shown below.
3. Then we click on the "About device" option, as shown below.
4. Click on the "Software Information" option, as shown below this place a little different.
5. After clicking the "version number" 7 times, the "developer mode is enabled" will be prompted.
6. Click the "←" icon to the "Settings" page, you can see the "developer options."
Okay, this is a small series for you to organize an open J3 mobile phone developer options for all the operation of the process, I hope this tutorial can help everyone.
