1. First download the sofa butler, and then refer to this tutorial, remove the suffix name (.apk) of the downloaded sofa butler file, and then save it to the U disk; the right file of the original file is renamed to remove the .apk. 2. Insert U disk into Hisense LED55EC680US any USB interface to open the box for easy use; 3. After you enter the poly, you can reach the bottom and find the "U disk assistant" in the tool column. 5. Find the sofa housekeeper saved in advance to the U disk, select Open;
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[Installation process]
1 Download the sofa butler to install the file to the U disk → 2 enter the use of search U disk assistant → 3U disk management to open the installation file → 4 to complete the installation
ã€Steps】 
Hisense LED55EC680US installs third-party applications via U disk
Hisense LED55EC680US models are equipped with Android operating system, Android operating system can be more convenient to install third-party applications. The following installation methods apply to all Hisense smart TVs.
1. Baidu search for "sofa manager" into the sofa network, download the sofa butler package; or directly click the link (http://app.shafa.com/shafa.apk) to download the sofa butler package.
Copy the downloaded apk installation package to the U disk.
4. Select all files;
If the installation fails, restart the device and try again by following the steps (may be useful). Still have questions please add the following sofa butler official QQ group.
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.