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The repair status checker gives you the latest status of your existing repair.
Check the warranty status of your phone.
Extend your device's original Manufacturers Limited Warranty for an additional 12 months.
Enter *#0000# on your phone’s keypad. The display shows your phone’s model and product code.
On older phones, these numbers are printed on a white label in the battery compartment, underneath the battery.
Select Menu > Settings > Security settings (or Security) > Access codes (or Change access codes) > Change PIN code.