The Mi Max is fairly slim at 7.5mm and there are chamfered edges along the metal body. The hybrid SIM tray sits on the left. You can either have two SIM cards or one SIM and a microSD card (up to 128GB).
Sony, which is known to make high quality products, has been very successful with this healt band. Using the Lifelog app, you can track all your activities like steps, calories, sleep hours etc.. It even comes with a silent alarm with vibration.