Is it really necessary to buy extra storage for the iPhone?

Is it really necessary to buy extra storage for the iPhone?

You can't add memory to iphones AFAIK

Can't add storage to iPhones. What you buy is what you'd have.

As far as it being necessary to get one with more storage, depends on your needs. Some can make 16GB work.

You are probably talking about icloud. No, I do all my backups in itunes.