I just updated a HL7800-M module to latest firmware 18.104.22.168 (from an ancient 1.7.5) without issue.
but now the debug console which used to work fine is no longer responsive. I was using it to monitor CSQ during active data connections and such. The only data it outputs is below:
U-Boot 2012.10 (Apr 10 2020 - 17:59:44) Board: ALT1250 Ver: 0.32-TG-D0 (PMP CPU Speed 120 MHz) DRAM: 2.5 MiB Now running in RAM - U-Boot at: 902a4000 Boot mode 3 Flash Manufacturer/Device ID is: 0x20bb18 Enable QUAD mode Flash: 16 MiB *** Warning - Merge environment, using default environment map import OK In: serial Out: serial Err: serial Configuring Flash Write Protection (offset 0x1e00) new_ce_val = 0x3a00f9f0 Hit '\r' or '\e' key to stop autoboot: 0 Version: 2.0 Nothing to upgrade... image part OK.