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I never had this problem until I had my cracked screen replaced. Thanks Zayad for posting a solution to this problem.
 
I never had this problem until I had my cracked screen replaced. Thanks Zayad for posting a solution to this problem.

If you're jailbroken, you can buy calllockscreen for $1.99. It's a bit expensive but I believe it will lock your phone once you're in a call
 
It worked well when I m the caller but what if I am already using my phone and u get an incoming call..then pressing the home button makes visible the background apps...how to lock phone then...this is major issue m facing these days coz m usually on phone when I get an incoming call
 
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