Accidentally called a foreign number back, can I get hacked?

I got a random call from Algeria tonight (I live in Australia), when I was using my iphone. I declined the call but accidentally redialled the number when I was in my call history. I ended the call before anyone answered but I wonder if I can still get hacked? Any information about how could have been calling and what they could do with my details?

Can you get "hacked" by calling a number? I have heard (no idea where), that some numbers when called, will charge you an enormous bill… Just to extrapolate on that, working in the VoIP telephony industry, if you call back a number that you don't recognise, say for example that it is a spam caller, you.

Yes you can get hacked