Tata Teleservices today announced lifetime valdity for its pre-paid, fixed wireless phone Walky along with a lower rate for local calls at 90 paise for three minutes.Terming it Walky Life, Tata Teleservices launched the service initially in Delhi, Gujarat, Karnataka, Andhra Pradesh and Tamil Nadu.The scheme comes with a one-time entry fee of Rs 3,200, and can be recharged with any existing recharge voucher starting from Rs 220 onwards."Walky Life offers the most economical home phone with local call rates as low as 90 paise per three minutes. National and international call rates provide a benefit of over 20% and 60%, respectively, when compared with other wireless home phones," an official statement said today.