The DBG_RX test point near sim pins is suspicious. Try to uncover the rest by removing sticker around it. Also probing the LTE module around the edges, will probably result in UART pins (unless it's disabled). Remember to measure Voltage of the test points, because You can fry the SoC by connecting 3.3V UART adapter to 1.8V pins. Anyway that's probably one of Qualcomm mobile SoC which OpenWrt does not support. Read this topic UF896 - Qualcomm MSM8916 LTE router ~384MiB RAM/2.4GiB flash, Android: OpenWrt? maybe You'll find something applicable to Your device.
1 Like