I purchased a U620L on eBay recently only to find the previous owner set an admin password, an also that apparently a hard factory reset does not wipe the password to default (admin) as I would expect.

Has anyone had any luck with this? The device works great otherwise...

Furthermore, I read the AT command reference guide, but didn't see anything in there specifically about modifying the admin password.

I did read that the unit can be "factory reset" via AT+CRST command, which I did with no observable result or effects.

Thanks,
Eric