You can print from an iPhone, although the "Android print function" is mentioned. Epson offers the iPrint app for iOS, which allows you to print from an iPhone as long as the device and printer are on the same Wi-Fi network.
According to Epson, this is the average print time of the cartridges included with the printer. They base this on a print volume of 100 A4 pages per month and the lowest autonomy obtained with the set of ink bottles included, which should therefore last for three years. This excludes photo printing.
The Epson EcoTank ET-2861 does not have an automatic duplex function. The duplex printing function must be carried out manually, i.e. the sheet must be turned manually to print the other side.
Yes, the Epson EcoTank ET-2861 has a paper tray. The base model includes a standard paper tray that can hold up to 250 sheets of paper. You can also increase the paper storage capacity by adding an optional paper tray, although specific details on this optional tray are not mentioned in the sources provided.