speaker option enabled by default when answering the calls

Can any of the applications change the call settings? All of a sudden have observed that when an incoming call is answered, Speaker is enabled by default. After uninstalling some of the applications related to calls, it became normal. But I would like to know what/which caused the change in settings. Apps I deleted are TrueCaller, Call Recorder . Any information related to this is helpful. Thanks in advance. Samsung Galaxy Note 2 running 4.1.2 JellyBean.