Whatsapp call interuptions ... solution needed. Reward offered to best idea !!!

I have been using Whatsapp for a year now, for chatting it is great ... and more recently i have been using it for talking to friends around the world, and for business calls ... with a good internet connection the call quality is great.

The BIG problem is that when i get an incoming call on the mobile network it just cuts off the whatsapp call !!!

I have spent hours online looking for a solution to this - when i am on an important call i do not want to be cut off!!!

If anyone can help me solve this problem, i will send them some STEEM as a reward !!