WHY WON't MY IPHONE 5C DOWNLOAD APPS ANYMORE?

I have an iphone 5c that is suddenly unable to download apps, everytime I try to download something I get a message saying that the app is unable to be downloaded at this time. I have even factory reset the phone and changed apple IDs but it still does that!

The Iphone 5 (All versions) is no longer supported by Apple. Check your IOS, it's probably 10.3.3 while the current IOS is 12.2. Generally, Apps require a current version of the IOS. Apple expects you to upgrade.

  • Why won't my iphone place calls anymore? This didn't happen until I upgraded to ios 6 last night and since then I can't place a call. I will select a person to call and it starts but it never connects then just says call ended. I have an iphone 4, that i got a few months ago. I can still text, listen to music, surf the web, basically everything else I have turned it on and off, and also done a hard reset, neither worked
  • Why won't my iphone 3G let me download apps? I will click on an app and the install button will go really weird and ike half the writing will be covered up and i then won't let me press it! Its really annoying me! and hopeully its got nothing to do with updating my phone because i can't because it will brick it
  • Why won't my iTunes recognize my iPhone 5c anymore? My iTunes used to always recognize my iPhone, even my laptop right away had something pop up for it when I plugged it in. My brother recently got a new iPhone so he signed into his iTunes and ever since nothing happens when I plug my phone in besides charge it, same for my brother. Is it because he signed in or also because I just updated iTunes? I've tried restarting both my iPhone and laptop.
  • Why won't my iPhone make certain sounds anymore? For some reason my iPhone is not making sounds for certain apps such as camera, or for standby mode. I checked the settings, and both "lock sounds" and "keyboard clicks" are on, yet I don't hear either of these. I know the speaker works, because it plays music and I can use speaker phone. Anyone have any clue what the problem could be? I also tried resetting the iPhone, didn't work.