which is came first? Well i don't know.
I am using sony ericsson and its has a very good speed other then nokia, samasung and others.
I like my phone very much.
i am using a sony ericsson now. my previous phone is also sony ericsson, i replaced it with no damage at all. if i replace my current phone, i'll definitely purchase another ericsson phone. i am very satisfied with their products specially with the hardware material, the phone can fall a number of times but it won't break into pieces unlike other mobile brands.
Samsung phones are the most durable. I saw it on discovery channel and they performed lots of durability test for their phones. Some tests include dropping the phone over and over and freezing the phone still the phone works normally. If you are talking about compatibility, I think nokia is the best. Nokia's go fast support from 3rd party softwares. im not sure about sony ericsson but the keys of their phones lag! it takes time before you can input another character or number.