Scheduled Maintenance Activities - SBI has scheduled maintenance on September 21, 2025, from 00:15 hrs to 01:00 hrs IST, during which UPI services will be temporarily unavailable [1][6] - HDFC Bank will conduct maintenance on the same day from 01:00 am to 05:30 am IST, affecting several services including Mutual Funds transactions and RTGS [3][4][6] - Kotak Mahindra Bank will have maintenance from 1:30 am to 2:30 am on September 21, 2025, impacting its services [5][6] UPI Lite Services - SBI has advised customers to use UPI Lite Services during the maintenance period, which will remain operational for low-value transactions [1][6] - UPI Lite allows transactions up to Rs 1,000 per transaction, with a cumulative daily limit of Rs 10,000 and a maximum balance of Rs 5,000 in the UPI Lite account [2][6]