I just wanted to leave an update here. We were in touch with Kelly over email regarding this case. The devs analyzed the logs from the receiver and they didn’t find any hardware-related issues with the device. Currently, we can conclude that the issues with the mobile data connection are most likely caused by the data-only plan on this AT&T SIM card. Based on the feedback from the users with the data-only plan AT&T SIM cards, the issue was resolved once the SIM card is on the regular plan (voice calls/data plan).
In case someone else faces issues with mobile data on Reach, please first check all the recommendations we listed in the How to provide Reach RS2+ with internet access via a SIM card support tip. If it doesn’t help, please reach out to us to support@emlid.com and send the details about your plan along with the Full system report from the receiver. We’ll look into it.