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The searching names in contact became difficult, normally with first few letters the names start coming, but in this case find switch was required, and then it used to to take long time, making calling and using contacts a difficult task. The battery was also draining too fast.
Hence I had rest the phone to factory reset on 25 Feb. But still battery draining is still faster as compared to without nightly update of 9.2.2.
These needs to be looked in and corrected.