sberman wrote:
In addition to the responses above:
I, as well as my colleagues above, really enjoy Apple products and very likely would tend to recommend them. But here, we’re talking about an iPhone 5C. This iPhone was released by Apple thirteen years ago! The latest iOS version it can use is iOS 10.3.4, which was released by Apple in July 2019!
Do not buy such an obsolete product, even if it is from Apple and does not have Activation Lock.
It is quite possible that it would not be able to reactivate such an old phone – even if it was not Activation Locked. I'm not sure where the exact cutoff point is, but there have been threads in these forums to that effect.
The iPhone 5c can connect to some 4G (LTE) data networks, but lacks support for Voice over LTE (VoLTE). That feature first appeared in the iPhone 6 and 6 Plus. Many carriers have shut down 2G and 3G networks, making any iPhone that predates the iPhone 6 and 6 Plus useless as a cell phone.
Apple has raised minimum system requirements for iCloud over the years. Now, even iCloud Backup and Restore, and iCloud Photos, require a minimum of iOS 12 – which the iPhone 5c cannot run.
System requirements for iCloud - Apple Support
The iPhone 5s can run iOS 12 – but be warned: like the iPhone 5c, it lacks support for Voice over LTE.
At the end of next January, a key security certificate required for the operation of things like iMessages (Messages sent from one Apple device to another over the Internet) and FaceTime is set to expire. Apple patched "end of the line" versions of iOS as far back as iOS 12. They never, to my knowledge, patched iOS 10.