The camera is of very poor quality. I upgraded to it from the A30, which had a camera with superior shooting capabilities. Shoots at night, in less than ideal settings, and just before dawn, but the resulting photographs are identical to those taken during the day. For a poor score of three. That is to say, when we compare images taken with good daylight on the A30 and the A51, the ones taken with good daylight on the A30 were superior. The sound coming from the person speaking is very low. On the A30, the volume is higher. There, the volume slider was not set to its maximum, and here, even at its maximum, it is not loud enough to be heard on the street or in other noisy areas. The problem with the scanner is a separate one. In order to get into the phone, you have to position the child's thumb exactly where the imprint is located on the screen while holding the phone at a right angle to the child. It is just not possible to do this action for the first time while holding the phone in one hand and using your thumb. In the end, I decided to disable the fingerprint sensor. There is also the Xiaomi Note 9 Pro, and the power button has a fingerprint impression on it. It functions quite well. The mobile device is loaded to the gills with a wide variety of supplementary functions and shell chips. In my opinion, the vast majority of their mass was completely pointless. It is not possible to remove or freeze many of them. The music you were listening to was disrupted when your Bluetooth device disconnected. Thankfully, I don't rely on it too often. The most important thing is that these phones lose their memories. Well, that's the jamb. 2 years did not work, reboots began. Regarding servicing, they said 12,000 repairs were needed. The prices quoted by private sellers started at 4. Because of this, I was able to sell it on eBay for the price of 4.