Ah, no. Maybe for certain altcoins probably yes, but when talking about Bitcoin mining there's no way an iPhone, or whatever mobile phone currently out in the markets, could mine Bitcoin in a decent and effective manner.
yes, it is absolutely impossible to mine bitcoin using an iPhone or any other cell phone. Even the class of RIG with high specifications is not very successful at this time. It will take a lot of capital.
There are several new cellphone vendors who say that they can do mining on their cell phones easily, but until now the project has not progressed.
currently there is still hype about staking and farming, because it is the easiest way to generate other tokens even though they are not bitcoin.