EG25GGBR07A08M2G might be giving Major problems on AT&T

We’ve had EG25G modules in our device for quite a while now. With our new batch and simcards they are having major connectivity issues which, in our field, can be detrimental. We have devices running EG25GGBR07A07M2G that work fine. We’ve been debugging for a long time. Could you please send over the files to up- and/or downgrade the devices? Is there anything documented on this problem? Thank you in advance.

Kind regards,
P. Muis

This is solved, it seems not to be directly due to the firmware