mere pass qmobile a8 hai and main whatsapp use karta hu data plan pe, problem ye hai ki jab tak whatsapp use kar rha hu tab tak msgz delay nahi hoti,, par jab use nahi krta means screen off hoti hai to whatsapp ke msgz boht der k baad rcv hote hai, kabi adha ghanta to kabi ek ek ghante k bad rcv hote hai.. any solution?

thanks in advance