LG -G510 User Manual page 184

You can remove the contents of Cache memory or change the
Cache mode.
The contents of Cache memory will be removed.
You can change the time for checking the Cache memory.
The cache is always checked whenever URL is loaded or URL is
navigated.
The cache is only checked when the WAP is started.
The cache is never checked. In this setting the cache can be seen
as disabled.
A list of the available certificates is shown.
You can reset profiles to return to original settings.
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