I used Viber last night at 10 pm and I got notification that I had low balance of internet so I went to sleep. In the morning i found that I was out of balance of internet so I top up thinking that the apps in background had used the remaining of MB. I found out that my Viber shows "" Last seen " at 3 am. How is that possible? Did someone at the house used my Viber at that time or it shows the time I run out of MB? Please can someone help me?