My daily driver is my iPhone 7 but I also have an iPhone 4S, 5S, and 6S.
The 6S is my backup and is the phone I would return to if something happened to my 7. I wasn’t planning on getting a 7, but after a family member got a X they gave me their 7. Apple then replaced the phone due to the no service issue so I basically got a refurbished iPhone 7 from Apple (in perfect shape with new battery) for free. Hence the 6S became my backup.
The 5S I originally bought used to use as a backup for my 6S and as a running phone.
The 4S I bought used last year (on iOS 6 and in perfect condition with only 16 battery cycles) purely for nostalgic value. It was my first iPhone and I always regretted trading it in.
The 6S is my backup and is the phone I would return to if something happened to my 7. I wasn’t planning on getting a 7, but after a family member got a X they gave me their 7. Apple then replaced the phone due to the no service issue so I basically got a refurbished iPhone 7 from Apple (in perfect shape with new battery) for free. Hence the 6S became my backup.
The 5S I originally bought used to use as a backup for my 6S and as a running phone.
The 4S I bought used last year (on iOS 6 and in perfect condition with only 16 battery cycles) purely for nostalgic value. It was my first iPhone and I always regretted trading it in.