All these phones can be  activated except CDMA ones for Sprint and  Verizon. Sprint  and Verizon have made these phones obsolete and won't activate them anymore. This means they have removed them from their networks. However, they are still usable as mobile devices. Below are a few things you can use them for. If you have anymore ideas of what they can be used for please let me know so I can add them to the list. Also if you try any of my ideas and they don't work please let me know so I can remove them from the list. Send me more ideas about apps please. Here goes the list of my researched ideas:

1. Use it as a remote for Apple TV, Samsung Smart-TV, etc.

Download the Apple TV Remote app from the App Store and turn the iPhone into a fancy touch screen remote. Download the myTifi app to use it as an extra remote for your Samsung Smart-TV or any other Smart-TV's.

2. Streaming device

Sign in to all your streaming accounts, then throw music to AirPlay, Bluetooth, or Sonos speakers. Download TV, movie and radio apps to it so you can keep up with your favorite shows and the news when you are on the road. PlutoTV, TubiTV and Simple Radio are some of my favorite apps to accomplish this. And when I want to listen to just music I would either be on Pandora or Spotify. iHeart Radio is  probably another one to try.

3. Camcorder

Get a new hobby as an amateur videographer. Use the phone as a video camera so you don’t fill your iCloud with big files. Add a microphone, a glass lens, a battery pack and a mount. Leave it set up all the time for easy recording.

4. Kids’ Toy

It fits perfectly around a two year old’s hand which is when pediatricians say kids should start using phones. Play them nursery rhymes on YouTube. As they grow have them play games, read, draw and color. Teach them to use the calculator and download educational apps. Preload it with music, videos, family pictures and family videos. Teach them how to use the camera and led them make their own movies.

5. Use it as an iPod

Dump all of your iTunes music onto it and all the CD's you  ripped into your computer.

6. Surveillance Camera

This one is my favorite one of them all and probably one of the best kept secrets. Download Presence. It is the simplest app to use for converting your phone to surveillance camera.  I’ve used it as a baby monitor when my son was young. My wife would open the app at her work and see what the kid was doing at home.  A pretty nifty app. And now the kid is grown, he is using the same  phone as toy.