issue in connectivity after update 5.1.12.0

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2017-01-05 04:48

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after 23/12/2016 release update i decide to update 5.1.12.0G on 27/12/2016 but after update i see lots of problem
1.connectivity issue Wifi or data already connected but mobile not sync email or whatsapp messages or any other notifications please check or tell me solution on this.
see that screenshot