Well the mapquest service might have been free but you still have to connect to the internet in order to use it. Using yahoo also connects to the internet so you are being charged for both. If you want to do anything involving instant messaging or web based you need to have a Blackberry Personal Plan on your account. I would def recommend adding it this way you can avoid future problems.
everything you described sounds like it uses data. anything you use involving the internet (email, web browsing, data applications -mapquest and yahoo) uses data. even though the applications themselves may be free, you use data to utilize them.
if you plan on using apps as much in the future as you did this month, you should think about getting an unlimited data plan. on verizon it's $30 unlimited, not sure how much it is on AT&T but i'm sure it's comparable.
I looked on my phone bill and at&t charge me 200 extra bucks for data per usage
the bill said I had use 37,000 kb
which one did at&t charge me for,cause I'm not sure
More to the point, what did you instruct AT&T to include and bundle in your package deal? It wouldn't be the first time an account had been incorrectly provisioned.
Your extra cost is about right for 37MBytes off package ($6/MByte) but I think your estimate of where that data went is open to doubt. A few pictures by email and a bit of map data seems unlikely to run this level, I get an average use for most months about 10-20MBytes with A LOT of email.
It sounds more like all your data usage for the whole month has been billed as off-package, so again it comes down to what services you requested, what you signed for, and what they provisioned.
Bottom line is call ATT and confirm you data plan. I would not second guess yourself until you speak with a CR and they give you a breakdown of usage. The rest is up to you on how you manage your phone use.
I don't think you understand. They let you run the telenav app for 30 without making you buy it. But it will download information like the map and routes and points of interest. All of this uses data and if you don't have a data plan than all you can do is make calls. All gps apps use data, all IM and Email uses data. Text messages are separate from data but still are not covered under your minutes per month.
Posted from my CrackBerry at wapforums.crackberry.com