Developer Mode Fujitsu Arrows U 801FJ

OS: Android 9.0 Pie

CPU: Qualcomm Snapdragon 450, Processor clock: 1.80 GHz, Number of cores: 8, GPU: Adreno 506

RAM: 3 GB

Display: Color / IPS TFT, 16M colors, 1080 x 2280 px (5.80") 435 ppi, ~78.3% screen-to-body ratio

Camera: 13.1 Mpx

Battery: Li-Ion 2880 mAh

Developer Mode on Android phones adds a set of special features to the device's developer settings, but sometimes demanded by ordinary device users (for example, to enable USB debugging and subsequent data recovery, installation of custom recovery, screen recording using adb shell commands and other purposes).

Unlock and enable Developer options

1. Go to the phone settings and click on the menu item 'About phone'.
2. Find 'Kernel Version' or 'Build Number' in the menu.
3. Click on this item repeatedly. After a few taps, a message will appear stating that Developer Mode will be enabled soon.
4. After about ten clicks, you will see the message 'You are now a developer!' - this means that the Android developer mode has been successfully enabled.
5. To enter the developer mode options, open 'Settings' - 'For Developers' or 'Settings' - 'Advanced' - 'For Developers'.

How to disable Android developer mode and remove the 'For Developers' menu item.

In the Developer Options menu at the top of the screen, toggle the switch to 'Off' .

The 5 Android Developer Options that can be customized

1. OEM Unlocking
Android devices give you the freedom to install a custom ROM, which replaces the default OS with a new one. To do this, you must first unlock your bootloader.

2. Running Services
Running Services lets you view how much RAM currently running apps are using.

3. USB Debugging
USB debugging lets your Android device interface with your computer by using certain commands.

4. Default USB Configuration
By default, when you connect your phone to your computer, it will only charge your device, and you need to select the data transfer mode each time.

5. Override Force-Dark
Enabling this slider makes all apps use a dark mode

Thomas Nilan
Smartphone Expert

Thomas Nilan is a mobile phone expert with in-depth knowledge of the Android and iOS operating systems, who understands the settings of various hidden features that allow you to expand the capabilities of your smartphone, as well as get information about what is going on inside the phone for future repairs. He is an authority in his field, which has allowed him to become a ghostwriter for several technology publications, and he enjoys writing small mobile applications for testing smartphones.