If you are using your phone data Network connection then phone will drop data connection as networks can't handle data and voice simultaneously.
This problem can be resolved if you use wi-fi connection.
Domanda
Is there any way to maintain Network connection when receiving or making a call using Android mobile?
Data connection losses when receiving or making a voice call from my device. I am working with an application that need to maintain network connectivity during the call time?
Soluzione
If you are using your phone data Network connection then phone will drop data connection as networks can't handle data and voice simultaneously.
This problem can be resolved if you use wi-fi connection.
Altri suggerimenti
This depends on your mobile network type.
GPRS service has 3 classes: A/B/C
Maybe you are using Class B.