1. Can the apps(?) use internet data when I'm not using the apps?
This has already been answered, but yes, you can keep apps from accessing the internet. Make sure you have someone show you how. Different phones have different routes to what you want.
2. Is there a new technology on the horizon for cellphones that will be amazing and available in the next year or so?
Not really, from what I think is your standpoint. New, faster phones, using 5G are coming, but you don't need 5G to do what you want to do. When those 5G phones come out, the prices for 4G phones will begin to drop. This is always a good time for people new to smartphones to buy a phone.
3. Can I take print-ready photos on a phone or are they only internet-ready photos? I don't know what the difference is, but some photos print well, and some don't. I want to take ones that do.
"Internet Ready" images are usually only 72dpi. Some website images have been optimized to be pretty skinny on the megabytes, and rarely print well. Current printers can print at far higher resolutions, and phones can offer printing at those high resolutions. I think my phone will capture at least
4. Is it true, you can't turn a smartphone off?
Not true. You can easily turn a smartphone off. In fact, a smartphone will charge much faster off, than if it is on. I rarely turn my phone off, but once in a while I do just to clear all the circuits. Sometimes, if my phone starts doing funky unexplainable things, I'll turn it off, and take out the sim card, and leave it out for a minute or two. This totally discharges all of the working circuits, and when the sim card goes back in and is turned on, things often right themselves.
5. What is the battery life of a smartphone? My friend charges hers twice a day. My flip phone, I charge once every 6 weeks.
I charge my phone once a day, sometimes twice a day, depending on how much I use it. If I'm using Google Maps a great deal, or going online often while shopping, I'll use the battery faster and It'll need a recharge by midafternoon. One thing to remember: Always get your phone off of the charger as soon as it has been charged
. So, for example, don't put it on the charger when you go to bed and unplug it in the morning. You will weaken the battery, and it won't be able to hold a charge in less than a year. I can wake up (around 6am) and charge my phone in an hour or less and it'll be ready before I leave the house at around 8:30. I also keep a USB charging wire i my car, if I need to repower while I'm on the road, but usually the morning powerup does it fine.
And remember, I'm a 100 megabyte/month plan, which some people on here seem to think is impossible
Yes, it can be done IF you have reliable access to wifi wherever you go, and IF your phone recognizes the Wifi access types. I have had some phones and tablets on my workbench that will only connect to my 2mhz wifi. Some places can't offer both 2 and 5mhz. Some older phones will hardly connect to wifi at all, anywhere. If you can do it, that's awesome!