==== notes ====
  * Apple announced the first iPhone in 2007.\\ Ref:- https://en.wikipedia.org/wiki/IPhone

==== hard drive sizes ====
<code>
2010	iPhone 4	 32 GB
2012	iPhone 5	 64 GB
2014	iPhone 6	128 GB
2016	iPhone 7	256 GB
2018	iPhone XS	512 GB
2019	iPhone 11 Pro	512 GB
2020	iPhone 12 Pro	512 GB
</code>

Ref:- https://lemire.me/blog/2020/12/22/in-2011-i-predicted-that-the-iphone-would-have-1tb-of-storage-in-2020/