Bharat Sanchar Nigam Limited (BSNL) has launched a new STV (Special Tariff Voucher) priced at Rs 168 that is aimed at customers who frequently visit a foreign country or planning to go for an extended stay. The STV offers BSNL subscribers international roaming for a period of 90 days. BSNL subscribers can use the Rs 168 STV to activate the international roaming. Notably, the tariff voucher is not a permanent offering from the telecom company. It is valid only for a limited period of time and also not available in every circle. According to TelecomTalk, the BSNL STV is only valid until September 9, 2019. Users who want to activate the tariff need to activate the plan before this date. However, it should be noted that the plan will not expire before it completes 90 days validity. That means, if you activate the plan in August, it will not expire on September 9, but continue to function until it completes 90 days. Also, the voucher is only available in Kerala circle. So, BSNL subscribers from only Kerala circle can avail the special tariff voucher. The public sector telecom company might be testing the viability of the STV before it offers the pack in other circles. Also read | Airtel vs Reliance Jio vs Vodafone vs BSNL: Best annual recharge plans with unlimited calling, data benefits Earlier, BSNL launched the Abhinandan 151 prepaid recharge plan. The plan, priced at Rs 151, offers 1GB data per day along with unlimited local and STD calling without FUP. The plan also offers 100 SMS per day. The validity of the Abhinandan 151 plan is 180 days.