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Android 6.0 (Marshmallow)
Hear is how to fix failed upgrades, solve wireless-connectivity problems and bring back a ‘bricked’ device on Googles new OS Marshmallow
Marshmallow upgrade unavailable
Sometimes you might have to force your device to manually check for the update. To do this you will want to Launch settings, tap ‘About Phone’ (or ‘About’), followed by ‘System Updates’, the ‘Check for Update’. If you don’t get offered the chance to update, then you will have to wait for your devices manufacture to make the new update available unfortunately this can take weeks or months. If you are tired of waiting you might be able to download the Marshmallow system image and manually force the update. This can be very complicated and the method can vary a lot between devices, so you will be best searching google how to do the update on your particular device.
Upgrade failed or phone unusable
How you recover your device from a failed upgrade depends on what went wrong, if your device is still working normally simply try again but make sure your device is plugged in and has a stable and reliable internet connection – Wi-Fi is generally better then using 3G/4G. If your device has crashed and is frozen on one screen or won’t turn on, you can reset it by holding down the power key, volume down for about 10 seconds. If this does not work and you think your device might be ‘bricked’, try and boot in to Recovery Mode: holding down both the volume up and down buttons and holding the power button for about 5 seconds, if it works you will see a text based interface that you will navigate using the volume buttons and power button as enter. From this menu you can reboot your device or wipe and restore it to factory settings.
Notations work intermittently
If you feel that the notification are less reliable in Android 6.0 you might not be imagining it: In Marshmallow there is a new battery-saving feature called Doze but has the side effect of stopping some of your apps from behaving how you might want them to. So to stop it go to settings, then Battery, followed by the menu button (The three dots, top right). Then Choose ‘Battery optimization’, tap ‘Not optimized’, then choose ‘All apps’. You then want to tap on the apps whose notifications are affected, then choose the ‘Don’t optimise’ button, then tap ‘Done’
Can’t Connect to 3G, 4G or Wi-Fi
Wireless connectivity problems are nothing new for Android devices, but Marshmallow has done little to fix them. If you can’t get a signal, then you should try turning the relevant connection on and off. To get to Android’s Quick Settings your simply have to swipe down with two fingers from the top of the screen. You will then want to tap on the Wi-Fi or mobile-connection, wait a few seconds then press the icon again to switch the antenna back on. If this does not work you can always try resting your device by holding the power and the volume down button for about 10 seconds. If this does not work last resort would be to launch settings, tap ‘Backup & reset’, followed by ‘Networking settings reset’, then ‘Reset settings’.
USB connection doesn’t work
With earlier Android versions you could simply connect your device to your PC via USB and as long as your device was unlocked you could use Windows Explorer to navigate the folders on your device. In Marshmallow, you will have to do a bit more work. From the home screen, swipe down from the top left, tap ‘USB for charging’ then choose either the ‘Transfer files (MTP)’ or ‘Transfer photos (PTP)’ button.
Camera app won’t launch
Unfortunately, there is no single fix for the ‘Can’t connect to the camera’ error message in Android 6.0 – it is simply a bug that Google need to hurry up and fix. While you are waiting the one sure fire way to clear the error is to restart your device, just hold down the power button, then tap power off, then turn device back on. You can take some preventative steps to stop it from happening. If you are using apps other than the Camera app that can use the devices lens, then close them before launching the Camera: just tap on Recants Button then swipe left or right across the apps you want to shut down.