Network problem occurs when we change one place to other place sometimes I get very good range of network and sometimes not.I think it may be a heavy traffic problem on net and may be a network problem but it is true sometimes speed comes very high and downloading speed also comes very good when speed comes then you can download very fast. Now this sim is free so go as soon as possible and take the sim after that you enjoy internet till march and life time free calling. so go and take this hurry.enjoy. After march there is very low price of packs of internet.