I felt that some of customer service of certain companies didn't take our complaint and problem seriously. The solution that they are giving to us are same despite whatever problem or complaint that you report to them. Worst are they ask us back with some dumb questions. For example, TMnut and Asstro giving me same solution despite i calling them few times for different problem until i can remember and know what they going to say next.
I hope in the future they will improve their customer service. After sales service is also very important to retain your customers as well. I hope that these big companies will invest a lot of money to improve their services. If not, customers will say goodbye to you