I took one of the cheapest watches to play with the firmware (I took it on Wildberries for 669r), so I won’t judge strictly. I came across a version on the MT6260 chipset with three megabytes of flash memory. The battery came almost completely discharged, the watch quickly turned off from a low battery level. The screen resolution is 240x240, the clock is round, so the corners of the screen are hidden under the case. There are two buttons, they seem to work like on / off and "back". I did not connect to a smartphone, I did not insert a SIM. I did not test the battery capacity, it is very small and most likely does not last very long.
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