belal wrote^ If they told you that your line can't be upgraded then it is most probably that they're bullshitting you. They told that to my neighbour who's 50m away from me and closer to the central(aklulo raso, eno 256 is the max he can get! yet his modem parameters are better than mine!). Check your modem parameters, specifically your Line Attenuation in the modem's page.
here's what I get on my router
Down Up
SNR Margin (dB): 17.1 25.0
Attenuation (dB): 63.5 31.5
Output Power (dBm): 10.6 14.2
Attainable Rate (Kbps):1056 832
Rate (Kbps): 256 128