Here is a rewritten and improved version of the original content in English, with additional explanations to make it more natural and detailed, ensuring it exceeds 500 characters:
---

Many users face issues when trying to download and install apps from the Sofa Butler after cracking their device. This is often due to the system's "package installation program." However, the fix is quite straightforward:
1. First, open the Sofa Butler app, go to **Toolbox > Device Information** to check the ADB and Root status. As shown in the image below, both Wireless ADB and Root should be enabled.

2. Next, navigate to **Toolbox > Super Authority** and tap **Open** to grant root access.
3. Go back to the main menu, then select **Toolbox > Installation Settings**, and change the option to **ROOT** mode.
4. After making these changes, power off your device and restart it. Then try downloading and installing an app through the Sofa Butler. Many users have reported success after following this process.
Once everything is set up correctly, you'll be able to access various free live streams and on-demand apps via the Sofa Butler.

If you still encounter problems after restarting, try entering **REC mode**, selecting **Apply Update from Backup**, and then performing a downgrade or re-crack. For a detailed guide on how to enter REC mode, visit: [http://bbs.shafa.com/thread-1418349-1-1.html](http://bbs.shafa.com/thread-1418349-1-1.html)
For more Huawei box cracking tutorials, check out:
- [Latest "Huawei Wyatt" Cracking Method and Problem Summary (2018)](http://bbs.shafa.com/thread-1433439-1-1.html)
- [Huawei Yue Box Bricking & Cracking Guide with Third-Party Firmware](http://bbs.shafa.com/thread-1423818-1-1.html)
These guides provide step-by-step instructions and troubleshooting tips for users who are new to the process.
Flexible Substrate
As the structural support and optical signal transmission pathway and medium, flexible substrates are playing ever-increasingly important roles in advanced optoelectronic display devices. The use of flexible substrates will significantly reduce the weight of flat panel displays and provide the ability to conform, bend or roll a display into any shape. Moreover, it will open up the possibility of fabricating displays by continuous roll processing, thus providing the basis for cost-effective mass production. Flexible substrate mainly used in thermoelectric refrigerator accessories, high-end car seats, car cold cup, car refrigerator, head display, car power, home appliances, medical devices, semiconductor chips, laser projection, optical device packaging in optical fiber communication and other fields.
Currently, there are mainly three types of candidates for flexible substrates: ultrathin glass, metal foil, and plastic (polymer) films. The raw material use for our flexible substrate is PE base double-sided copper clad with 0.3mm thickness. We are equipped with professional metal etching equipment and exposure development equipment. We use fine etching process and manufactures, we can guarantee that our etching flexible substrate can achieve double-sided etching of different graphics, alignment, neatly arranged, and no shedding, no incomplete, no pores, no inclusions and other appearance defects.
Etching Flexible Substrate,Double-Sided Etching,PE Base Double-sided Copper Clad Flexible Substrate
SHAOXING HUALI ELECTRONICS CO., LTD. , https://www.cnsxhuali.com