2GB data plan enough?

You can login into your att account online and you can see each months data usage

you can dial *data#

Kenn Hughes :
It just dawned on me why I ran up 85Mb of received data in just a few hours. I absent-mindedly updated some Apps! So, I guess one easy way to prevent running up your data allowance is to always update Apps, etc. via iTunes through your computer rather than over 3G!

Invisible-bob:
If your phone is set to PUSH email, that means that it automatically retrieves messages via 3G/WiFi in real time (or in the time interval that you set - every 15 min, 30min, etc.). If you set PUSH off, email is only retrieved when you go into the Mail app. PUSH does tend to use up battery life, and would run up your data allowance if there is no WiFi connection available. By setting PUSH off, you control when you want to retrieve messages, allowing you to wait until you have access to a WiFi connection.

I have my PAC, now all I need is the actual iPhone 4. Is there one to be had in the entire UK? =0)

NormCash1968 wrote:
<...>
Invisible-bob:
If your phone is set to PUSH email, that means that it automatically retrieves messages via 3G/WiFi in real time (or in the time interval that you set - every 15 min, 30min, etc.). If you set PUSH off, email is only retrieved when you go into the Mail app. PUSH does tend to use up battery life, and would run up your data allowance if there is no WiFi connection available. By setting PUSH off, you control when you want to retrieve messages, allowing you to wait until you have access to a WiFi connection.

A few corrections...

In PUSH the email is sent to your phone by the server--the phone does not initiate a connection to 'retrieve' it. To do this an open connection is maintained. (It is much the same as receiving a phone call--your phone doesn't 'check' to see if a call is incoming, it knows it because the server says so.) The 'time interval' does not enter into it.

The time interval refers to FETCH. In fetch the phone actively initiates a link to the server and checks the server for email each time the 'time interval you set' elapses. You do not have to 'go into the Mail app', the system does it for you.

If you set the 'time interval' to MANUAL the phone system never goes out and checks--you must physically initiate the check after executing the mail app.

Note that you can have PUSH enabled for those servers that support push and MANUAL set at the same time which means that you check the 'non-PUSH enabled' servers you may have accounts for by executing the mail app and initiating a check.