iPhone 6s plus
The first iPhone was bulit on January 9, 2007.
iPhone 6s comes in two storage variants which are 32GB and 128GB.
Yes, iPhone 6 and 6s are interchangeable as far as cases go.
IPhone 7s are more supirior
An IPhone 7
2014
Depends on which iPhone you buy. iPhone 5s comes with 16 or 32GB of storage. iPhone 6 & 6 Plus comes with 16 or 64GB of storage iPhone 6s & 6s Plus comes with 16GB, 64GB, or 128GB of storage.
If you mean: 19s = 4-6s then the value of s works out as 4/25 If you mean: 19s+4-6s then it can be simplified to 13s+4
it is a very good phone!!!!!!!!!!
Start a GoFundMe account.
Possibly, but if their naming history is any indication, it will be an iPhone 6S variant in 2015, then an iPhone 7 by 2016.