The Lenco TDV-900 is equipped with Android version 6.0
The Lenco TDV-901 is equipped with Android version 7.0
It is possible that some applications that only work on Android 7.0 or higher no longer function on the TDV-900. In addition, it can also happen that applications that previously worked on the TDV-900 will no longer function on Android 6.0 after some time because, for example, the application has been updated.
It is not possible for both TDVs to upgrade the android version