Umts pendrive modem installation

[Rodolfo Medina <rodolfo.medina@gmail.com>]

I've been following the guide at:

 http://www.debianclan.org/index.php?option=com_content&task=view&id=154&Itemid=38

and I managed to make the Momodesign umts modem work under Debian Etch.
Although, the connection is very slow: 15 Kb/s whereas under MS Windows
they're about 80 Kb/s.

Does anyone have any experience with this matter and/or any suggestions about
what the problem might be with Debian Linux?  I compiled the kernel, as
described in the above guide, so it shouldn't be because the kernel is too
old.  Maybe a complete kernel update is necessary?

Thanks in advance for any help
Rodolfo