There are many passwords out there that are worth a shot.. some stores use their own passwords. (And in some cases the phone allows you to pick from a list of retailers, so pick Walmart and try these 2) Here are some I know of:
Walmart device: rollback, Walton
Bestbuy: blue
Others I’ve read have worked (worth a shot right?!)
- galaxy
- ruletheair
- rethink
- demomode exit
- instoredemo
- unlimited
- remove cod
- nationwider