Just to let all know, I tried using the Mobile 25 with an android tablet and it works!!!
I just plug the usb cable to the tablet's On The Go cable connection and then use an app that has a keyboard.
There´s no mention anywhere about this, my tablet is about 3 years old so it doesn´t even need to be a recent android version to work.
Don´t have the 49 but as they're the same hardware I think it will work too.