BB Bold :: 9780 Registers Download Fail For Large Files

I just recently purchased my blackberry bold 9780, and i would have liked to use it for downloading videos, which are between 30 to 60 mb large. I'm furious at the fact that my friend who has a bold 9700 can download the entire file using his normal browser, while the same download fails on my bold 9780 halfway through it, and this happens every single time I try to download. I would have expected blackberry to atleast add a download manager in this supposedly newer and better version of the 9700, but instead it has more flaws. I would really appreciate someone from blackberry technical support to have a look at this issue and reply to me asap.