Hi,
On Fri, Mar 26, 2021 at 07:49:37PM +0430, morteza ali Ahmadi wrote:
In order to have an internet connection in UE, we have run OsmoGGSN project to set up GGSN. Also, SGSN is developed in our system.
So you are seeing a problem between your custom, non open source SGSN and the UE, but you ask here on the Osmocom list for assistance? If I'm correct, then the following holds true: As we don't have access to your custom SGSN, only you can investigate and resolve that ;)