Sony C1505 User Manual page 113

Accessibility Enable your installed accessibility services and adjust related
settings.
Developer
Set options for application development. For example, you can
options show CPU usage on the phone display and show visual feedback
for touches. You can also set the phone to enter debug mode
when USB is connected.
About phone
View information about your phone, such as the model number,
firmware version, phone number and signal. You can also update
your software to the latest version.
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