Thanks! dbelam
Well probably something is fried since I’ve connected the LED Matrix directly to 3 x 1.5v AAA batt. pack (4.5v) 
and the SDA & SLC from the matrix to the GSM+BLE pin 1 & 2 and also to the GSM Breakout B5 and B6. (stupid me)
Now if I connect the SDA & SLC to GSM Breakout the matrix is not lit at all; If I connect them on the RePhone GSM+BLE board then half of the LED Matrix displays some random lit dots and exactly half of it works properly displaying half of the pattern I want …
To solve this thanks to alexandru.m.ghe reply on the “Access the GPIO Pins based on Different IDEs” I have replaced the
“D3” in code with “3” and yupiii it worked as expected.
Regards,
Catalin