How do I put back 3G data connection Maybe a month ago I set my device to use only wifi for data connection. Now, with a bigger data package, I try to find where I can put back 3G for data connection.

I didn't do any fancy tricks nor # 4036# ... things.

Any ideas ?
You can turn 3G data back on through 'Settings'.


Go to 'Settings'
Go to 'Wireless &amp; Networks'
Somewhere near the bottom should be 'Mobile Network' - enable it


Now you're phone should have both 3G and WiFi enabled. If it can connect to a WiFi, it'll use WiFi; otherwise, it'll fall back to use 3G.

edit: as Seth pointed out below, these instructions may differ slightly between android phones (but should be relatively similar). Instructions above are for the HTC Desire.