Product Description : </b> <br> How to Upgrade to Android 8.1 <br><b>Please watch the video instruction on Youtube；https://youtu.be/zTNIV5m2ODw </b></b> <br> How to active Google service <br><b>Please go to user settings-app settings-tools(top right)-enable google framework, the device will reboot and the google play is activated </b><br>How to transfer files from Mac OS to Likebook Mars <br><b>You need to install androidfiletransfer.dmg on your Mac Devices in advance then Reader can be recognized by Mac system</b> <br> How to Install Dictionary <br><b> Likebook Mars support StarDict Dictionary, Set up a folded named: Dict in the root of the Likebook Mars , and Copy the dictionary (StarDict) Inside, Reboot this device </b> <br> How to Install New Fonts <br><b>Set up a folder named: Fonts in the root of the Likebook Mars , and Copy the New Fonts Inside, Reboot this device </b> <br><b> Mica House Likebook Mars Unbox video </b> <br> https://youtu.be/0Sc0Ncfxvso <br><b>How to install Google play store on Likebook Mars </b> <br>https://youtu.be/vrNPB--t2gA <br><b> Contact with info@sz-mica.com for any after service issue </b> <br><b> Warranty: 12 months exclude Eink panel </b>