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Here I have Yumi DG S2 Pro and let me show you how to enter the factory mode on the following device
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So at the very beginning let's start by pressing the power key, let's choose power off and
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wait until your device will be completely switched off. Then you need to use the following combination of keys, power key and volume down
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Let's hold down together those two keys for a couple of seconds, power key and volume down, keep holding both keys and release them as soon as Yumi DG logo pops up on the screen
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Let's wait a couple of seconds until the factory mode pops up in front of you
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Alright now you can use the factory mode so here we can navigate by using both volume
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keys and confirm options by pressing power key. Here we can perform the automatic auto test, you can perform manual test, item test, you
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can see test report, you can also select debug test, you may also perform hard reset by choosing
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clear eMMC but let's just be careful with that one because you will lose all your personal
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data, you may also choose version to check out your current system version
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If you would like to go back let's use reboot, so the reboot option will just restart your
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device by quitting the factory mode and entering the normal mode. So let me do it, let's press power key to choose reboot and the device is simply restarting
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and booting into a normal mode
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The home screen pops up so it means that everything went well, thank you for watching, please
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