I just received my AM5 and tried to update the firmware (hand controller was at FW revision 2.1, mount FW was at revision 1.1.2) using the ASI Mount App on my iPhone 13. As many others experienced, I got the "Get Data Failed" message on the AMH Management System firmware page in the ASI Mount App. With ZWO's support, we determined the problem was difficulty of the mount/hand controller communicating to the internet (connecting to the FW server) through my mesh network (Orbi Mesh Router). We resolved the issue by connecting the mount/hand controller to the internet through my iPhone's hotspot (cellular data), then using an iPad to run the ASI Mount App. I updated the hand controller FW first. After updating the hand controller to the latest revision, the latest revision of the mount became available, and I updated the mount to V1.3.7. Hopefully this workaround can help others who are experiencing the "Get Data Failed" issue.