I know I'm in a very small minority in this respect, as I use an iphone with AT&T's prepaid GoPhone program. I understand that this is not supported, but its worked for me, until Friday evening (yesterday) when I discovered a $78 charge for data usage. Related to this thread, and maybe because of my situation, I discovered something that may not have been mentioned in previous posts. Please pardon me if this has been mentioned before (I've read the first 15 pages of this thread, and the last page, but nothing in between).
For several months now, I have been using a 3G phone, carefully monitoring the data use. I pay $19.99 for 100MB data. I have to be careful, because if the balance in my data plan drops to zero, I will be charged at the rate of 1 cent per KB (that's $10 per MB!).
But, until now, its been great. Really. I've been VERY happy with AT&T's go phone system, and the customer service and the account website. On a recent vacation during the last half of January, for example, I enjoyed using the web for a variety of purposes, and found that generally, I could surf the internet for a couple of hours and use something like 10MB of data (no music or video streaming).
Recently decided to upgrade to a 3GS. I finished transferring the data from my 3G to my 3GS on Thursday morning. At that time, I believe my account had about 52MB available data in the plan account. Between Thursday morning and Friday evening, I did use the internet during the day, and I would estimate that I used it about 2 hours. There was nothing different about the character of my data usage than previously. So, based on previous usage, I would have expected to draw down my data plan account by about 10MB. By contrast, and much to my dismay, my account was depleted by Friday evening, and as I mentioned previously, my account had been charged an additional $78.
Since then, I've been quite ****** off, and found this thread and have been studying my account history. There were two major data usage periods accounting for the depletion of my account, one on Thursday at 8:21PM (26,737KB), and a second on Friday at 9:23AM (23,013KB) (the latter period coinciding with the $78 charge). I noticed on my account history that each usage period of the GPRS system had an associated duration.
For example, on Thursday, the data charge of 26,737 was listed as having a "call duration" of 7hr 25min 37sec. Then, I noticed that for every single entry on my account history, if I converted the call duration to seconds, i.e. (7hrs * 60min/hr * 60sec/min) + (25min * 60sec/min) + (37 secs), the answer in seconds was equal to the number of "units charged".
THAT IS, ONE SECOND EQUALS 1KB OF DATA!
Is the GoPhone accounting system unique in this respect? Do others have a call duration listed? Are people actually paying for TIME connected to the cel data network, rather than actual KB used? Several earlier posts in this thread suggest to me that for some reason the 3GS remains connected to the cel data network even though it that connection may not actively be used, and that would correspond to the data usage pattern that I see in my account. That could be dealt with by turning off the Cel Network, which I have done for now.
Are we being charged for the wrong units? Anyone find this interesting?