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Here I have a Manta combat and let me show you how to enter the factory test mode
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At the very beginning let's start by pressing the power key right here, keep holding power
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button, choose power off and tap ok to confirm it. Let's wait until your Manta will be completely switched off and afterwards you need to use
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the following combination of keys, the power key right here and the volume down
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So right now let's hold down together these two keys, power key and volume down, release
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both keys as soon as Manta logo pops up. And this is the factory test mode here, you can navigate by using both volume keys and
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confirm options by pressing power key. You can perform here the full phone test, so you can test all hardware features, then
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you can view the phone test results or you can perform the item test
1:00
So let me press the item test, here you can for example check out the version, this is
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your version of your device, if everything is correct let's use volume down, if not let's
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press power. In my case let me use volume down. You can for example also test the vibration, let's press power to begin the test, let me
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use volume down to pass the test. So here we've got other tests such as the camera, SD card sim, charger test, FM test
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sensor test and you can also use bug option to go back to the previous menu
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Here you can also use other features from the factory test mode or you can also quit
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this mode by choosing exit. So let me highlight exit and press power key to confirm it
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Right now the device is booting into a normal mode, let's wait a couple of seconds until
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you will be able to use your device
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Excellent so now you can use your device in a normal way, so everything went well, thank
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