gingerprince, on Sep 26 2006, 18:31, said:
Word of notice when roaming. I just got back from the states - I had the GPRS monitor running to make sure nothing was downloading, and every now and then it'd register a few hundred K - quite often when I tried to connect to the hotel WiFi and it missed - it's start to dial and I'd cancel. However looking at my t-mobile bill it hasn't (thus far) actually logged any activity. So either it didn't actually download anything (and the GPRS monitor is confused) or it takes a while for roaming data charges to be transferred (even though the voice calls already have).
Just a point of note.
In my experience, GPRS Monitor doesn't predict my T-Mo USA data usage well at all. I compared 6 weeks of use. GPRS monitor was on average 25% higher, but there were days that T-Mo said I was 33% higher than GPRS Monitor. It was definitely correlated (p=.7) but wildly inaccurate. I emailed the company, was forwarded to a tech, who said 'how could we possibly be accurate for every one of the hundreds of cell providers.' I asked for a refund.
Now what is interesting is why. First, GPRS monitor attempts to track all usage, some of which is overhead and the companies aren't including in billing. But at the same time, the companies seem to be estimating data usage and not recording it exactly. I suspect that GPRS Monitor is in fact accurate (although including unbilled overhead). If I left my data connection enabled but unused for a day (I did a hard reset to insure nothing was connecting), T-Mobile said I used a small amount of data (4K). GPRS monitor said I used about 12K. Now the only thing that was running was GPRS monitor and keeping my connection alive with the registry hack.
By the way, the palm Treo doesn't have the problem of data overuse at all. Checking email with a treo, I used 20% of the data I use with the T-Mo MDA, doing precisely the same thing on the same volume of data. Checking email when there are existing emails on the server uses a lot of data in Windows Mobile, not in Palm.
Thanks for the program; I will use it traveling. The one sure way not to be overcharged is to have GPRS off.