3 ms·TCP Connections can be upheld in IDLE-Mode for 25 Minutes without causing any traffic.by blueflow 11y agoTCP Connections can be upheld in IDLE-Mode for 25 Minutes without causing any traffic.feld 11y agoYes, but this doesn't let your mobile phone's radio sleep and eats excessive battery.blueflow 11y agoWhen the radio sleeps, how should the Phone notice the push? How do you think Apple's push works? Edit: Apple's APN also uses TCP.