Samsung Galaxy A02s - View Signal Strength
Here's how to view signal strength on your Galaxy A02s.
From the status bar, view the signal bars 
(upper-right).
(upper-right). | Session Status |
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Due to inactivity, your session will end in approximately 2 minutes. Extend your session by clicking OK below. Due to inactivity, your session has expired. Please sign in again to continue. |