Nokia Asha 503

Step 1 of 4

Find "Check for updates"

Press Settings.

Step 2 of 4

Find "Check for updates"

Press Phone update.

Step 3 of 4

Find "Check for updates"

Press Check for updates.

Step 4 of 4

Update phone software

If a new software version is available, it's displayed.
Follow the instructions on the display to update your phone's software.