Similar to browsing on a public computer, the same holds true for your mobile phone. It is definitely not difficult for someone to gain physical access to your handset while you are away and get to your inbox simply because you saved passwords to reduce the need for some extra key pressing. When using your phone’s browser for browsing or using any popular mobile browser such as Opera Mini, we are often tempted to save our password, as it makes it so convenient to browse. All you need to do is initialise the application and you are ready.
This also has a downside to it. Hence, we should be cautious and it is wise to enter your password each time you browse.