WiFi usage

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I'm kind of puzzled here. When my WiFi is turned on, I have a constant data transfer of about 20 Kbps (10 send, 10 receive), whilst if I switch on 3G, I have no data transfer (unless of course I'm browsing or whatever). Also, the WiFi drains about 10% battery / hour, which seems awfully lot to me. I have already tried to switch off all syncing, WiFi policy is set to never go to sleep. Any ideas?

Try "turn off when screen off". My wifi drains 1-3% depending on reception and amount of sync. Sometimes apps seem to hang when syncing and keep the phone awake more then they should thus draining more battery.

Sent from my GT-I9100

The point would be to have wifi always turned on, so that it notifies me when I get a new email.

Mine seems to be on although it is set to be off when the screen is off because I still get new mails or updates.

Sent from my GT-I9100