Yes, BlackBerry KEY2 does have the OTG support.
Yes, BlackBerry KEY2 does support wi-fi calling.
Yes, BlackBerry KEY2 does have the MicroSD card slot. It basically has a hybrid slot. You can expand memory up to 256GB.
No. BlackBerry KEY2 does not have any specific water protection certification.
Yes, BlackBerry KEY2 can record 4k videos at 30fps.
Stellar battery life. A tactile and genuinely useful keyboard. Great software with a focus on security and privacy. What more could you want? The BlackBerry Key2 is an exceptional phone.
The BlackBerry KEY2 is the best Android-powered BlackBerry ever made, and it improves on last year's formula in almost every way.