Pathetic Samsung Customer Support

[Irtzamughal]

Why is Samsung Pakistan Customer Support is so pathetic... 

I updated my phone to One UI 4 on February Update. After that Update, there was a major difference in battery time. 

Before that update I almost spent whole day with single charge on normal usage but after that update it barely lasted a day with Power Save On. 

The Customer Support don't have any logical Explanation to this