Hello hervinder,
That is certainly a jump in the usage.
Did you select to check for any BlackBerry OS updates around that time? These aren't automatic, allowing a user to pick a time when the connection is unlikely to be interrupted, but the file size is high enough that this may be the culprit.
Alternatively, did you have the phone in your possession around that time, or could someone else in the household have accessed it? If the latter, could they have been streaming or downloading anything such as video files?
We can't see what any usage was for, just that it took place, but it may help give a better idea if we can see the length of the data session, so I'm sending you a private message to allow us to access the account.
You can find your PM inbox here. If you can't access this link, please ensure that the box next to "Turn on private messages" is ticked on this page, and let us know if you need any further assistance.
Dave
