Dataone HUL 900 will also carry a regular telephone rental component in addition to the Rs 900/- internet charges. By default, that Rs 180/- more, if u are on the standard phone package. You get 50 local voice calls free. In addition to the above charges, you have to add taxes, modem rentals etc. Whereas HUL 900 Plus will have no phone monthly rental. You do not get free calls, but you can still make outgoing calls. All calls will be charged at 1 Re per pulse. Only Rs 900/- p.m. in your bill, (plus taxes and modem rentals if taken from the department). If you do not use your dataone line to make a lot of calls, then you can go in for the plus option which saves you on phone rental.