I'm looking for a samsung TV which 55 inch under 50 k which model is best

My samsung tab a9 plus is now stable now after update. One ui 6 and 6.0 was issue and bug tab keeps on crashing. Now after 6.1 one ui tablet is stable no issue one of the best tablets now. Thanks samsung for responding and fixing the software 

Does samsung ac ai mode helps to reduce power consumption?

Is samsung M series M stands for Mega. Once there was Mega galaxy Mega series.2013 2014 year. Models. It think Mseries is kind Mega series come back

Any issue with this update. Is it safe ?