My first smartphone was Samsung Galaxy Chat, but...
The first time when I have decide to buy a smartphone, I must admit that I have a low budget, sow that's why I have decide to buy something cheaper. My choice was between 3 brands, but I choose the Samsung because I like the keyboard. After 3 months the phone start to have some problems with the calls. The phone was 3-4 times on service, but the repairers can not fix the problem and they have decide to replace the mother broad. So, basically I start to use my phone after 6 moths!
I have that phone for almost 2 years until I have found out that LG have a great model (F60) who gives you the best performance for that prize.