I have become a regular donor at my local Red Cross. At first, it was just something to do to support my local Red Cross. However, it has become a regular thing to do because I enjoying drinking blood.(just kidding, my ancestors were not from Romania) Anyway.... I discovered that the best current iPhone for donating blood is the iPhone SE that I bought for free from Verizon Wireless late last year. All of my other phones are 5.5-inch or bigger iPhones and Andoid phones. While donating blood, it's not possible to use my left arm because the big needle is in my arm and I can't move it. With the iPhone SE, I can do everything with just my right hand only. if only Apple releases a new iPhone SE in red.