Carrier-locked phones regularly fail to register coverage bars due to software restrictions. The v2.0.9 framework addresses this via explicit CSC parsing:
: Open an ADB terminal shell and input adb shell su -c setprop sys.usb.config diag,adb to launch the diagnostic interface. qcdma-tool v2.0.9
: The developers often add support for newer security patches. Conclusion qcdma-tool v2.0.9