The strap is very nice in terms of quality. We had no trouble wearing the watch for an extended period of time, but you must find the right fit for your wrist or it may feel scratchy on your skin. Also, you can easily swap the strap for another one you prefer. If we had one complaint, it would be that the power/function button could have doubled as a digital crown, which would have improved the overall experience of the watch. The SpO2 and heart rate sensors, as well as two magnetic pins for quick charging, are located on the back of the watch. The GTS 4 mini’s display is a slight improvement over its predecessor, the GTS 2 mini. The screen has grown from 1.55 to 1.65 inches in size, and the resolution has improved slightly. It’s still an AMOLED screen with the “Always on Display” feature. The display is by far one of the GTS 4 mini’s best features. It is sharp, vivid, and sufficiently bright to allow you to read the time outside in direct sunlight. The display, however, is not flawless. We frequently felt that the clock was a little slow and did not respond smoothly to our touches/taps because the display does not refresh at 60 Hz. Furthermore, while the bezels around the display are somewhat thick, they do not detract from the overall experience because the deep AMOLED blacks blend well with the black borders. When we first got the watch, the always-on display worked perfectly and turned off automatically at night according to our schedule. But that soon changed; the AOD no longer turned off automatically at night, and even when we tried to turn it off completely, it remained on. A quick factory reset solved our problem in an instant. Before we get into the watch’s performance, let us first look at the connectivity performance. The Amazfit GTS 4 mini connects via Bluetooth 5.1, and we had no trouble pairing the watch with our smartphone. The connection was rock solid and effortless, so there were no complaints on the connectivity front. The UI performance of the watch was also fairly smooth, with only minor jerkiness. The lack of a 60 Hz display slows down the watch and detracts from the overall experience. The most important aspect of any fitness watch is activity tracking. During testing, we discovered that the watch was quite accurate in terms of heart rate and step counting. However, the watch did not count some steps at times, but this is something that can be fixed with a future software update.
