S5100 (Android4.0) pre-installed (with S5110)：

　　http://jxdcc.yesigame.com/enupload/yuzhuan/S5110enUI.rar

　　To download a good pre-installed into the a S5100 root directory (apks / the roms / pictures / ...)

　　Upgrade Method Of S5100

　　Before Upgrade:

　　1. Please back up all data of the device. All installed documents in the device will be cleaned out after upgraded.

　　2. Put all the download firmware of S5100 in the root of the TF card

　　Upgrade Steps：

　　1. Connect power 5V 2A

　　2.. Upgrade the Uboot: Under the power-off state, press the 'Power' button while pressing the 'VOL+' button to upgrade the device, it will show ' upgrade.zip, waiting' . The system will be upgraded automatically, it will show ' upgrade uboot success' after it's successful, then the system will reboot.

　　3. Upgrade the system firmware: Under the power-off state, press the 'Menu' button while pressing the 'Power' button to upgrade the device, it will show ' upgrade update.zip, waiting....' The system will be upgraded automatically, then the system will reboot.

　　4. After reboot, the touch screen needs to calibrate, it will show the main interface after successful calibration.