called at 1:58 am. No one on line.

Similar as stories above.  Called at 2:11am.  Thank goodness the ringer was off.

Called me at 3:57 am. Thankfully my phone was on silent or i would have seriously chewed some dumb [***] [***]

Unsolicited call

Same issues as previous posts. They called at 3:57am - phone rung once and no message left. Unfortunately, with iPhone 4 there is no option to block a number so needless to say, I was awakened and PISSED! Woke up late for work this morning as a result of interrupted sleep!