Hi Donald,
Thank you for the response.
To set the APN manually, the Mobile Network Settings is disabled (greyed) when the android boots up. So Settings->Mobile Networks cannot be turned on manually.
Currently I am using AndroidRIL_V9.0.3.0. Is it not compatible with Android Pie?
The Latest RIL software that you have shared is for ARM 64bit. I do not see one for 32 bit. Please share the latest RIL software link for 32-bit.
Regards,
Sabiya Francis