General :: Some Apps Not Working When Phones On 2G Internet And Not On WiFi

Some apps like location tracking apps on my sons phone does not work all the time when his phones on 2g internet. But on wifi it seems to work all the time. Apps like life360 location tracking apps, remote control apps like androidlost, which uses push messages and also polling services works intermittently. Sometimes it works on 2g internet and sometimes it does not. But on wifi, there's no problem at all.

But strangely messaging apps like viber works continuously on 2g or wifi without any problems.