To RASHEED NP,
A little google work gives me the impression that menatelcom uses wireless tower signals similar to the USA's 3 and 4 G data for the internet. And in fact I saw an ad for a 4G modem although I assume you may still be on 3G type technology.
I can refer you to a link that shows various ways to improve your modem's received signal in terms of external antennas and signal amps. And how to find RSSI and signal noise ratios which is a measure of the signal strength. I will apologize for the crass commercialism of the web site, but its still a good place to learn about wireless issues.
As many have found buying an external antenna or signal amp improves their internet speed, but if your problem is an overloaded tower, there may be little you can do about it. You can also get good clues by a simple ping command. As soon as pings greatly exceed 250 MS, any hope of fast data speed is lost.
PM me if you need more information.