JBL charge Bluetooth portable speaker?

I just bought a JBL charge speaker. I paired it with my iPhone 5 and am able to listen to music. However, I'm not able to listen to the calls from phone via Bluetooth on the speaker. Can anyone help me with a reason why is that happening?

As Far As I'm Aware Based On The SDK And Development Of The iOS, This Is Intentional Without It Being A 2 Way Communication Device Or An Automobile On-Board Communication System.
What I Mean Is That Since The Speaker Does Not Have A Built In Microphone, Or Has Firmware That Determines It Is A Part Of An Automobile System - It Will Not Transfer Calls Over To The Speaker.

I Believe This Is A Cue From The OS To Only Handle Calls Through A Bluetooth Mechanism That Supports Input + Output (Bluetooth Speaker With Mic [Turtleshell By Outdoor Technology]) Rather Than An Output (Bluetooth Speaker Only), While Still Using The Phone Microphone As The Input.

I Hope This Is Clear Enough, And Sheds Some Light On This For You!

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