As the development of smartwatch, we have updated the DDR in NO.1 D5+. DDR2 to DDR3, it’s a storage update, so the old firmware can’t use in the new D5+. And how to distinguish between the two versions? Here I want to share a easy way to check the version of your watch. Open the dialpad, type the codes *#4321#* on it. Then you would get your version of your watch. Here is a comparison of the two version. The old SoC is W612_WGL_W_S_D5_COMMON, and the new one in the right picture is W613_WGL_W_S_D5_DDR3_COMMON. You can’t flash the W612 firmware in W613 D5+. Their firmware is not universal! Please check your D5+ version, before you flash the firmware. And download the right firmware in NO.1 website download page. Website: https://www.chinawatchs.com Facebook: https://www.facebook.com/001phones/ YouTube: https://www.youtube.com/user/001phones VK: https://vk.com/no1phones Google+: https://plus.google.com/b/103465466477124761117/+NO1Phones/posts