Trust able network in India.i am using airtel network for last 5 years .the network coverage is very good .it is good even in rural and tribal areas too.i used different sim but when I go to my grand fathers house with my family, my mom dads phones become dead because of no network they are using not airtel.but my sim has minimum signal to make a call.so it is very good.the only disadvantage is price the internet and call charges are high compared to other .so most of the people use it as emergency sim in there duel sim phones.using other networks for calling and data due to high price of airtel.