Default [Q] Using Headset with MIC on VOIP app

I'm trying to use a headset with mic (I'm using the Apple headset for Iphone) on LG G Pad 8.3. When I play music, video or youtube, I can listen from my headset when plugged in. When I tried a VOIP app (google voice/grooveIP, Magicjack), I'm unable to route the sound to the headset or speak thru a headset mic. It is using the tablet speaker and mic. Although it works with a BT headset but not the wired headset plugged into the tablet earphone jack. I prefer to use wired headset than BT. Has anyone tried using a wired headset for VOIP apps? Thanks