When i got connection from Wi-Tribe on 21-4-2011, i visited their Customer Service center situated near Baitul Mukaram Gulshan-e-Iqbal Karachi
The person who entertained me about their packages told me that
"" Our ENDLESS 512 Kbps package is Absolutely Unlimited, but here is a little Cap that You Will get 30 Gb Bandwidth in this package but in case if you have consumed your 30 GB limit your Internet Connection will not be terminated and you will not be extra Charged for anything, we will just Downgrade your speed from 512kbps to the Half or Less than Half, but your Internet Connection Will Still work without any additional charges after consuming 30 GB and when you will pay your Monthly Invoice Due Amount, you will again get your 30 GB bandwidth with Full 512Kbps Speed.
Upon consuming 50% Bandwidth i got an E-Mail from Wi-Tribe and According to that E mail
NEW VOLUME POLICY
Your account will not be downgraded once your subscribed monthly volume is exhausted
Once your subscribed monthly volume is exhausted, you will be charged Rs. 0.15 for every 1 MB consumed till the time you purchase a volume add-on or the start of your next billing cycle (1st of every month)
Wi-Tribe is Bloody Liar i sent them E-Mail on their E Mail Address two times but no one is even replying me