Is it possible for someone to hack my iphone 4s without me even knowing
Yes, that's why you always need to check the calls made by the phone, against your bill every month.
Anything is possible with the technology nowadays.
I wouldnt be suprised now adays........
The I phone is one of the easiest to hack.mine was hacked about 8 months ago had the get the police involved and they told me it's one of the easiest.
It usually happens with a text, that's how the Trojan virus gets through