Chandigarh, May 15: Ping pre-paid subscribers can now make STD calls at Re.1 per minute and all local calls at just 1 paise per second with Rs.39 Easy Recharge Top- Up. The offer on Ping Plus STD39 e-recharge Top-Up is valid till 21st May, is applicable on all Ping Prepaid Value 299, Life 499 and Supreme 199 activation packs, according to a company press release. Ping also offers free talktime worth Rs.120 and full year validity on its Rs.240 rechargeTop-Up.