Thought I'd share... the later problem posted here is a known issue with 3G networks in my country (ports are closed for packet data).

The weird thing however is that, changing providers significantly improves the network speed. Which suggests that it may not just be the port that's in question.

So I read some articles and found out that Torrent has this "Encrypt outgoing connection" option. After I enabled it the connection where I'm having slow transfer rates increased significantly.

My guess is that there's a system detecting the traffic on the provider's end. To relate that to this topic, I've noticed that Transmission also has this encryption option with the following settings:

Require Encryption
Prefer Encryption
Allow Encryption

I've tried experimenting with these and the Prefer Encryption option (which is the default I think) seems to have worked best, but connection still slows down every once in a while.

So my question is, are there other settings in Transmission that we can alter to better compensate for 3G / HSDPA connection types?