mobile data

In modern versions of Android, it is possible to choose access to the Internet through Wi-Fi or mobile data. I looked through a lot of topics and realized that now this is a problem. But probably colleagues are looking for ways to solve it. For example, I want to use Wifi only as an access point...

I have this problem. Device connected in wifi to an esp module, obviously without internet connection I need to retrieve data from an ftp server using mobile data connection, but seems the device only use the wifi with no success, ignoring the mobile data channel Any suggestion? wifi...