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[Installation process]
1 Download Sofa Butler Installation File → 2U Disk to Connect TV → 3 TV Enter File Management → 4 Read U Disk File → 5 Installation Completed
1. First, go to the sofa butler's official website to download the installation package, download addresses: http://, V4 and V5; 
If the installation fails, restart the device and try again by following the steps (may be useful).
2. Can cut 12.9 inches of large films, and use it as you like.
3. Automatic film feeding with movie exit function, more convenient to operate.
4. Cloud data update, update models automatically.
5. Hole Position Precise. The screen protector film, which has been cut is perfect fitting with the phone screen.
6. Suitable for different types of TPH / TPU / 9H / INK film
7. Support phone x and y mirror
8. Support the cut explosion-proof film in the size of 0.35-0.37mm.
9. Support car rear view mirror film
10. Support blank Back Film DIY function
LeTV 4 X43 Pro installs a sofa butler via U disk Select "Storage Device" Find "External Storage" Open the sofa butler package and follow the prompts to install it. At this point, your LeTV has successfully cracked the installation of third-party applications, and then you can play casually! After the sofa butler application market is installed, various live on-demand softwares can also be downloaded on the sofa. If you still can not read the U disk, it is recommended to format the U disk to FAT32 format (if there are other contents in the U disk, export and then format), or try another U disk. Watch on-demand video on smart TVs, recommend using a TV cat, watching live TV, and recommending live HDP; more interesting content, please use Tencent video TV version, Youku video TV version, etc. Fun smart TV and box, more exciting Content is on the sofa butler.
2. Copy the installation package to the U disk, insert the TV, do not rush to open the file management;
3. Find "Settings" and select "System Settings";
4. Find "General" and click to enter
Find the "safe" menu
Open "Unknown source application" option
Successfully opened the "Unknown source application" as shown below:
5. Next back to the desktop, find "File Management"