Thing that people forget is iPhone was not an instant success - the first gen was expensive (for the time, for a phone), it had no app store, no 3G so the internet was slow.
For a time dumbphones were still overselling smartphones.
It got better as mobile internet got quicker and people got used to the shorter batteries.
Odd that people were concerned about typing in phone numbers.
I had written a visual basic program when I was a school kid to dial using the modem and avoid having to remember phone numbers. Smartphones didn't exist at the time.
Also I had a friend who had an iphone and claimed that the assisted writing was as fast as typing on a computer keyboard. So we raced. I won, by far.
For a time dumbphones were still overselling smartphones.
It got better as mobile internet got quicker and people got used to the shorter batteries.