WP7607 Android 9 RIL SETUP_DATA_CALL fails (QMI, USB OTG)

Hello everyone,

I’m trying to integrate android 9 ril software into my Android 9. The kernel I’m using is 4.14.98.
On my android device the mangOH Red board (with the WP7607) is connected via USB OTG.
The SIM works fine on other devices, also the mangOH board works fine on a windows 10 PC.

I did all the needed changes described in the Android RIL Integration Guide. Now i can receive and send SMS, but i can’t establish a data connection.
The mobile network state is always “disconnected”, while the service status is “In service”.

Wifi is disabled, “Mobile data always active” is enabled. SELinux is running in permissive mode.

There are multiple errors in the radio log, it seems like the “SETUP_DATA_CALL” of the rild fails.
I can’t determine the actual error, maybe someone can find more…

radio-log part1
radio-log part2
getprop with the most important propterties
logcat while setup_data_call

Unanswered questions:

  1. I first tried it with the AT ril, but it seems like the QMI ril is working better.
    Is that true? Which one should be better in Android 9?
  2. In Android 6 we used pppd. Now in Android 9 there only is dhcpcd to setup the interface. Is pppd still needed? Was it replaced by dhcpcd?
  3. Might it help to update the firmware? Will the android ril work with newer firmware?
    Currently installed: SWI9X07Y_02.16.02.00
    Available on Sierra Website: SWI9X07Y_02.28.03.03

Thanks in advance!

Hi sMichi,

You should use QMI for WP7607 Android 9

The PPPD still needed for Android 9. The pppd is found at Android source code.

Yes, you should update it to the latest firmware

Sierra is also aware of data call issue on Android 9. Please contact your reseller or distributor directly for technical support.

1 Like

Hi Donald,

thanks for your answers. Where can I find more information about how to setup the pppd? In the android integration guide, ppp is not even mentioned…

Hi sMichi,

I have the information PPPD on Android 9 at here: https://groups.google.com/forum/#!topic/android-platform/Xs-AeHA4KVw
I also did not find the information about how to setup the PPPD in Android 9 RIL integrated guide.

If you need more information, please contact your reseller or distributor directly for technical support.