LG G4020 - Manual (Page 70)

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Web Access
Cache Settings Menu 3.5
The information or services you have accessed are stored in the cache
memory of the phone.
Clear Cache (Menu 3.5.1)
Remove all contexts saved in cache.
Cache Check (Menu 3.5.2)
Set a value whether a connection attempt is made through cache or not.
Security Certificates Menu 3.6
A list of the available certificates is shown.
WAP Information Menu 3.7
The WAP Browser version is displayed.
Note A cache is a buffer memory, which is used to store data temporarily.