2G disconnects Frequently

I have Intel XOLO (X900), I use a Airtel data connection(India). The network in my mobile 2G disconnects whenever I go home(at home there is poor network coverage). After I come out of my house, still the 2G is not enabled,even after enabling the mobile data multiple times. Every time I had to switch off the mobile and then start to get the 2G connection. Any idea on what's wrong?