KATHMANDU: On the occasion of its 25th anniversary, Bank of Kathmandu (BoK) has introduced a cashback of 25 per cent on mobile top-up of pre-paid and post-paid numbers of Nepal Telecom and Ncell using BoK smart card. The scheme is in place for a limited time only, as per a media release. The bank has been providing its services through 87 branches, 78 automated teller machines and 10 extension counters.