Jack ATC

Another follow up. Often times a browser will keep information that is pre-populate
fields. You may keep this in mind since it will appear that the config has not cleared and is actually being populated from the browser remembering passwords etc. This can be found under browsers security.

Great post--- As tonnick, has indicated these phones don't factory reset and they don't save well, It is crazy that the Firmware update doesn't clear the configuration nor does the Factory default remove configurations on the phone.
The Global Settings may show up anywhere in the phone and can't easily be removed.
Work around, I've found that sometimes your firmware update will clear settings and sometimes not, so if not, you can go to the Global Settings and just hit the spacebar to erase the entry but when it comes to the password you must enter a number such as 1, save and
Then restart the phone.