LOL, smarphones cameras works differently from prof cameras...optical zoom is optical zoom...you cant deny it that iphone has 2x optical zoom and not just digital zoom...physics dont lie thats why smartphones are getting ridiculous with multiple lenses on the back

Sony Confirms Xperia 1 III Phone With Jaw-Dropping New Camera Technology
Actually, Sony has just announced not one but three phones, with ingenious elements that set the company apart.

"As you’ll know, the real Achilles heel of any camera phone is optical zoom. You can’t build moving lenses into a phone unless you bulk up the size of the phone unacceptably. Except, in a particular way, that’s what Sony has done."