rocky U have NIGHT UNLIMITED 45 gb...means u have downlaoded 45 gb There is 2.5 gb free in h500...so your total usae is 45-2.5=42.5gb SO u will get 42.5 GB extra bill which will be round about 42.5gb * 1024 = 43520 mb U have to pay 0.8 INR for 1 mb So u have to pay round about 43520*0.8 = 34816 INR