Sounds like you have a non-North American version of the Rebel XTi. Give you local in-country Canon support line a call. 06-27-2020 09:28 PM. Well Canon's own pages recognise it as the 400D alright and those pages say they don't have the software.
Canon today released new firmware for the Canon EOS 5D Mark IV. Firmware Version 1.3.0 incorporates the following enhancements and fix: Enables NFC connection with smartphones running Android 10 operating system. *For Android running v6.0 or later, use Camera Connect v2.7.10 or later. *For 1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic EOS 5D Mark IV - Version 1.4.0. Where do download drivers for Canon PIXMA PRO-100 in Changes Firmware Version 1.3.3 incorporates the following improvement and fix. 1. Improves the AF controllability when shooting in Live View mode with a wide-angle lens (fixed focal length or zoom). Photosby Lisa, To attach your camera to a computer, your T7 manual says that your camera takes a Computer Interface Cable. IFC-400PCU (1.3 m/4.3 ft. (which is 4' long) Interface Cable IFC-200U (1.9 m/6.2 ft.) which is 6' long. Interface cable IFC 500U is 15' long. If you then want to attach one of those cables to your phone, you'll need an OTG WHulJX0.