GL7600(HL7692), PPP stopped working after fw upgrade

Hi. Had a working PPP communication over PPP, but after upgrade from 2.23 to 2.27 it stopped working. Tried tp roll back to old fw, but still not working. Any suggestions on what could be wrong. Have checked baudrate etc . Are using a logger in the other end.


Have you resolved the issue? Please try to check if modem still registers to mobile network.