A:AnswerYes, you should have no trouble using it with either of those devices. You'll need to download the free HP Smart app to control the printer from them.
A:AnswerHello. Thanks for your question. Yes, this HP Deskjet 2755e printer has the HP ePrint feature. HP ePrint essentially gives your printer email address. As long as it is connected to the wireless network, you can email it from anywhere and the printer will print the email and its attachments. Here are the instructions on how to set yours up. https://support.hp.com/us-en/document/c03721293
A:AnswerWhile it makes getting ink much easier, it's not required to use the printer (although without it, you don't get the six months of Instant Ink for free). The cost is based on the number of pages you'll print. For most home users, the 50 page plan is enough, which costs $2.99/month, or $36 for the year. And yes, you can cancel the plan at any time, although if you do, at the end of your current billing cycle you'll need to buy a set of cartridges for the printer.
A:AnswerThe printer will connect on the 2.4 GHz Wifi band, but not on the 5 GHz band. Please note that the 5 GHz Wifi band is _not_ the same thing as 5G cellular service. As far as I know, there are no printers that will connect to a 5G cellular network.