Yes, Nokia 3310 does come with removable battery.
The display of Nokia 3310 is 2.4 Inch with QVGA resolution.
No. You cannot record calls in Nokia 3310.
No. Nokia 3310 cannot be connected with WiFi.
Yes, you can change the display brightness in this phone.
There are a few things that do bring back the feeling of owning an original Nokia 3310, such as the classic Nokia ringtone, the physical buttons, the tiny body, and solid build quality.
You can buy other feature phones for less than this, and the new Nokia 3310 doesn't justify the extra outlay over the simple nostalgia card it's playing.