This is my 1st iPhone & I must say that it is a great device.
I’ve been using mobile phones for many years & I ultimately found the right one. The signal strength is excellent. It works even in basement.
There are many other benefits that one can realize only after the usage. The features work as expected. Nothing mis-behaves.
You can refer my other reviews e.g. Redme note 3.
The only missing feature is probably FM radio.