I think its because these brands dont do perper testing and release the update. I saw many people complaining there for the same problem and it means that lot of people are struggling with such issues on their smartphones. It is a sudden expense that I have to manage anyhow as I was not planning to buy the new phone but now since there is no other option left so I have decided to buy. Although I have not purchased it till now and still not decided which one I am going to buy but most probably it is going to be 11 series.

You're right that phone is like our girlfriend that we keep with us all time and now since last two days I feel like I have a lot of time since there is nothing must do on the basic phone as we can only use for the calling and text purpose.