Hi  @jfilipelcarvalh 

According to the translation of Google Translate, I think that your question is probably feedback on the Tether APP's functional improvements and questions about the router configuration. If there is any discrepancy, please describe it in English.

The following are responses and suggestions to your questions:

1. If you encounter instability and are unable to save the settings when using the TP-Link APP, please try to ensure that your device is connected to a stable Internet, especially for applications that need to save data online. You can also try clearing the cache and checking whether the application has the necessary permissions (such as storage permissions). Try uninstalling and reinstalling the application, and it's advisable to compare whether there are the same problems on other mobile phones.
2. We are very grateful for your feedback and ideas regarding the suggestion of merging the Tether APP, Deco APP, and PLC APP. However, due to the differences in functions, applied technologies and many other aspects among these three products, merging them into one APP maybe not the best choice for users who only use one of these products individually. Moreover, if they are merged into one APP, there may be problems such as larger memory occupation or being unable to manage all systems simultaneously. Of course, your suggestion is also very meaningful and it is of great help for us to improve and upgrade our products.
3. The configuration of Easymesh can be done through the web interface or the Tether APP. For specific details, you can refer to the following FAQ:

How to add the EasyMesh satellite devices via Tether App

4. We are very grateful that you continue to choose TP-Link products, and we also hope that the new products can meet your usage requirements. However, if both of the previous two routers have network failure problems, I suggest that you check whether the network source is stable. You can also consult the local Technical support to confirm whether the network connection method is correct. For example, whether the Internet connection type is Dynamic IP or PPPoE. All of these will affect whether you can configure the network normally.