hooking up a USB keyboard is not the answer for typing SMS!
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get one of the little wifi ones that clip onto phones an hook up via wifi/bluetooth.
https://www.aulro.com/afvb/images/im...015/06/664.jpg
that not exactly the one I was trying to find the one I was thinking of has a case built into it thats a kind of universal flip case. dead slow internets not helping.
theres a very specific one Im trying to find again.
its a combo keyboard battery tank wifi usb item and it came in a flip case with an elastic universal holder for the phone.
it had 2 little switches on it one switched the USB cable between being a USB/OTG keyboard and a USB charger for the phone and the other turned wifii/bluetooth on or off.
it wsnt hugely popular because of issues if you left the wifi/bluetooth on and tried to connect it as a keyboard and it was easy to knock the swithes. the battery life also never made the avertised time but you could through charge with it so if you left it plugged into the phone and then plugged in the usb charge cable for the keyboard it would charge the keyboard and the phone at the same time, frustratingly.. if you were using the keyboard as otg it would automatically turn over to charger and the supplied chargere didnt have enough to charge the phone and the keyboard at the same time if both had wifi or bluetooth on and running.
it was also easy to damage the usb cable for connecting it to the phone, thats what kille mine,
performance as a battery tank was moderate, it would give me about 30% extra on my old mio while watching a movie