I would like to use external input devices - a keyboard and mouse - for my Samsung Galaxy S4, SCH-i545, Android 5.0 Lollipop. I've seen YouTube videos where a USB mouse or keyboard were connected through a powered USB hub seemed to work. Elsewhere I've read that only Bluetooth devices will work, and in some cases that only specific Bluetooth devices meeting Android requirements will work. I have been unable to get USB mice or keyboards to work and I haven't tried Bluetooth or Android-specific Bluetooth. Can anyone tell me what will work or better still, is there a list of devices approved by Android/Samsung?
Thank you.