after update to 5.1 v problem lot

[thailandfai]

Cannot play video with sound ,it will become lagging and if off the sound video smoothly back....please hlp me how to fix it!before is all good function ,after update latest become like tis 

[nazzzz]

go here and test your speaker. if it's not functioning go samsung centre

[thailandfai]

after restart it normal back，but after use sometime lagging back ，if off sound smooth back while watching video。。after update become like tis

[thailandfai]

i test already it said speaker use by other app plz close it then
test again...

[nazzzz]

you may go to the nearest samsung centre n get your device checked