What is the full form of iphone?

That’s a good question, lots of people wonder this.

The name 'iPhone' doesn't actually have a full form. It's not an acronym. The 'i' is a branding thing from Apple, you know, like the iMac and iPod. When the first iMac came out, Steve Jobs said the 'i' stood for 'internet'. But he also said it could mean 'individual', 'instruct', and 'inspire'. So it’s more of a symbol than a shortening of a word.