So i found the solution of this I will teach you how to remove default homepage of micromax modem/dongel when it connects.
Follow below step by step guid to solve this problem (with pictures).
How to change the home page of micromax dongle 3g usb manager?
5.When you open Config_connection.ini file you will see [web]
url=http://micromax.com you just need to remove that URL and save it.see below image.
6.Now copy that file back to Config Folder and replace the existing file.
7.Now restart you PC.And reconnect you internet hurray no such annoying page is opeing if you follow the above steps carefully.
8.Don’t forget to say thank in comments.