Jyothi ji,
If you are really concenred with 2615, it had arrived on time this midnight today at 01:55 (right time and departed at 02:10 (5 minutes delayed) at/from Vijaywada.
In case, you are concerned with 2616, it is expected to arrive right time at 23:15 this evening (late night).
You can very well check further status at www.railenquiry.com.
Thanks!