What software needs to run on a cellphone to use it with the EkaPad?
This is the key. Many cellphones support USB, but only as a slave. The cellphone would need to support USB HID protocol for keyboards. We are not aware of any cellphones that support this USB HID protocol for keyboards yet. The technology is constantly changing and advancing, so we are keen to keep in touch on these issues via the Ekatetra Web site, www.ekatetra.com .