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 ?
I am using Samsung Nexus S. I think most of the android phones are very similar. Please follow the following steps;
Now you could enable "Data enabled" option, which is the first option could be selected.
Then, you could access the network through wifi or 3G.
You can turn 3G data back on through 'Settings'.
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.