Paytm-parent One97 Communications' UPI market share dipped to 9% in March, its lowest level in the last four years, following RBI's action on Paytm Payments Bank, Moneycontrol reported citing NPCI data. The company processed around 1.2 billion UPI transactions in the month, down from 1.3 billion in February. Meanwhile, the volume count grew for PhonePe and Google Pay in March.