In the flagship smartphones of the Galaxy S line, Samsung uses two types of processors – the branded Exynos 9820 and Qualcomm Snapdragon 855. Samsung’s own chips have never been famous for high energy efficiency. This year, Galaxy S10 models further strengthen this opinion. Test data show that the Exynos 9820 processors have lower performance than the Snapdragon 855 chips. As for battery life, Exynos smartphones run one hour less than their counterparts equipped with a Qualcomm processor. However, there is another problem called “ proximity sensor error ”, which leads to the spontaneous inclusion of smartphones in their pockets or bag. Smartphones \You can solve the problem by disabling the Lift to Wake and Tap to Wake functions. But this is not the last problem of smartphones on Exynos. It was found that with incoming or outgoing VoIP calls, the device cannot go into sleep mode. Constantly in active mode, the smartphone consumes more power and quickly discharges the battery. You can get rid of the problem with the use of IP-telephony only by rebooting the smartphone after a VoIP call. However, reusing this function leads to the same problems. So far, you can completely fix the problem only by completely abandoning phone calls through WhatsApp, Viber, Facebook Messenger and applications that support the VoIP function. I want to believe that Samsung is already working on a solution and an effective update for the flagships of the Galaxy S10 series is just around the corner.