For me:

First full month: 30MB+
2nd full mth: 112MB+
Now on 3rd month.

and I'm on a 2GB plan 

It depends on what you do and how you use it. My patterns:
(1) WiFi at both home and office. Download apps/patch or youtube/etc. when at home/office only.
(2) For 3G/Edge data, I used it for a lot of apps/games while outside, like Mail (Exchange, Gmail, Yahoo), Safari (browse some news website or google search somethings, no heavy website), Papago, Whatsapp, Foursquare, Facebook (no videos/pictures, just view and reply text), Lil' Pirates, and a few more games.
(3) Data usage tracking using iDataUsage

So, it all boils down to own use and discipline, and constant tracking, before and after browse each time.
Also, close all apps in background once done.

ahpingko,

Could be those Push notifications (Badges), try switch off all, and enable one by one.

ahpingko,

Mails ? Delete all email accounts in iPhone. Unless you find how to set it to not sync automatically at schedules time or push email.

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Added on November 29, 2010, 4:08 pmIf not working, then you may try remove the installed apps one by one. Some apps are somehow locked/automatic use 3G/EDGE instead of available WiFi.

hi, i just got my iphone yesterday...not so familiar with it yet...

digi just send me sms to inform that i have changed to iDiGi plan successfully..

so i enable the Cellular Data to ON and resetted the usage data counter..

then i close all apps (by double tap on Home Button and close all apps)

after awhile, around 15-30min, i check my Usage again..i saw there is some Received and Sent..Received>Sent..around 30kb data...and i think it keep on increasing...

i wanted to know why..(although digi did not charge extra for usage over the quota)..

any apps can see Opened Network Connections or Network Manager or any apps to see network activities??..

ahpingko why u so worry finish data? Digi no matter you over the date usage you still can online and will slow abit only.

hi, i just got my iphone yesterday...not so familiar with it yet...

digi just send me sms to inform that i have changed to iDiGi plan successfully..

so i enable the Cellular Data to ON and resetted the usage data counter..

then i close all apps (by double tap on Home Button and close all apps)

after awhile, around 15-30min, i check my Usage again..i saw there is some Received and Sent..Received>Sent..around 30kb data...and i think it keep on increasing...

i wanted to know why..(although digi did not charge extra for usage over the quota)..

any apps can see Opened Network Connections or Network Manager or any apps to see network activities??..

ahpingko why u so worry finish data? Digi no matter you over the date usage you still can online and will slow abit only.

For IDigi User, is there a way to keep track on the amount of data transferred so as within the quota limit of 1 GB.  I mean anyway to retrieve this info from digi system other than getting this reading from external apps.

i have same problem with you.. recently i'm using ivalue1, then i have switched to celcom prepaid. I have stop all notification, all the alert but when i check the data usage it still increase and my prepaid rm10 was finished in a day.. damn...!!!!!

ic3johan and 4evernelson : u notice there's an -ve sign at the amt due?

it means u made a pymt (perhaps ur line was barred and u arranged for a pymt to reactivate it again)

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Added on November 29, 2010, 6:41 ammaxis users : just a simple way to understand more on ur statement

1)u nid to know when is ur bill cycle/statement date (from this u'll know ur billing period)

2)for the data package as well as the call package will always be pro-rated for the 1st statement u receive after activation or changes done (eg : chg data plan,register new plan)

i'm sure a lot of users r not aware of these 2 main reasons why their bill charges went sky high

if u guys using smartphones will be more convenient (can always reset the usage statistics following ur statement date)

I always check my unbilled... =.= my charge in one night excess 80% credit limit..... and I actually off my phone last night so they say can't check because is unbilled so I have to paid....
btw is maxis

Hi i just got my iphone yesterday under maxis ivalue 1.
Any expert can guide me?
i closed off my 3g, celullar and wifi.
But the usage for data is still increasing, although in a very little pace.
Can i know what are the applications to look at which cause this movement?
i have turn off all notifications as well.
I saw from previous thread that somebody commented they might be some background programme which
is running. But i cant figure out what to close off again.
Thanks

Hi i just got my iphone yesterday under maxis ivalue 1.
Any expert can guide me?
i closed off my 3g, celullar and wifi.
But the usage for data is still increasing, although in a very little pace.
Can i know what are the applications to look at which cause this movement?
i have turn off all notifications as well.
I saw from previous thread that somebody commented they might be some background programme which
is running. But i cant figure out what to close off again.
Thanks

It is really pathetic to hv bought a smart phone but sign up to wrong telco. Smart phone becomes not so smart after all.