I have a 6828 which I flashed with Ariey Ultimate edition last year. It was basically serving the backup role at that time.
I now need it as a parallel phone, but the battery performance is quite low - only an hour on full charge. Need to revert to stock ROM from HP but am unable to do so.
Tried downloading the latest ROM from HP site, but I get the error "Code 203: Update is incompatible". Here's all that I have tried, but no change:
1. Copy .nb0 files to FAT32 SD card (which I used for the Ultimate Edition flash) and try to flash again (Call + End+ Power+ Reset). I get the screen asking me to Press the Call and End buttons again, but the devices resets in existing OS in a few seconds.
2. Hard reset : Call+End+Power+Reset, "-" keys in prompt screen. Same - just Hard resets the Ultimate Edition.
3. Tried a "Universal Bootloader" but get the error "\\.\WCEUSBSH001 port cannot open".
I am currently not able to reflash the device to stock ROM, or any other for that matter.
Please help with steps I can perform to rectify this problem.