Hey guys, just reporting my own experience with this issue in the hope that someone can shed some light on a possible solution. Initially my phone was regularly reporting the No SIM error, then reconnecting soon afterwards. The next day I received this very error, and reboots/battery pulls did not fix the issue.

Since then I have reflashed the eMMC and the OS, however the OS flash hangs at "CMT flashing failed". As a result, I attempted to reinstall the cmt-firmware-rx51 over the top of the existing firmware via xterm. after a reboot this alleviated the situation momentarily, however after another reboot the problem resurfaced. Subsequent reinstalls have not fixed it.

I really don't imagine I would do well with dismantling my phone, but other than sending the phone away for repair (now out of warranty), is there anything else left to try?