[sagher]

To be honest, I only used 2 companies Apple & Samsung in my entire life. So i cannot tell which company is worst in my opinion.

But i will go with @sagher about Qmobile, A local Pakistani brand and worstest brand.

i use many brands like local china market brands i never discuss here because it's strange... and the flagship phones. Sony make me too much disappointed with Xperia Z5 premium... yes it;s Premium but too much heating issue. back cam is 23MP but too shitty like 3.2MP and poorest focus. even my Huawei Honor 4C is much much better then Sony cam. even it's only 13MP. so i soldout i very cheap price.
the second i use is Samsung Note 5... and the trademark of samsung is to be hanging exact 1 year latter. after 1 to 1.5 year use of samsung any model. the phone goes hangup and little bit heatup. so i sold out recently.
Now i am looking for some good mobiles. i like Note 8 but it's still too costly.