One argument is that this portable service will be cheaper in that there are no airtime charges. Instead, the system is integrated with the regular fixed phone network and the tariff will be a flat Rs 1.40 per three minutes. But will the system give a real price advantage to the customer? Hardly. The security deposit is as high as Rs 25,000. Then there is a monthly rental of Rs 1,000 for portable wireless. Even in cellular phones, the security deposit is as low as Rs 3,000 to Rs 5,000 and the monthly rental is around Rs 160. Why should customers then pay such a high security deposit and monthly rental? And if you use the cellphone judiciously, you can end up paying airtime charges of Rs 1,000 or so, with far greater roaming freedom.