Sony ericsson z550i is a wonderful, cheap, durable, outstanding and one the best cell phones....once I went to a shop and saw many cell phones listed there...i found sony ericsson z550i to be cheaper and featured product compared to other..
I bought it and iam happoy using it...i got wet so many times during rains but nothing bad happend to it....this makes it one of the most durable cell phones of all time...it seems that quality that sony ericsson provides is much better than any other cellular company... although nokia is the biggest cellular brand followed by the sony ericsson, I feel sony ericsson should be at no.1 spot when it comes to quality and durability...the other phones offered by sony ericsson such as walkman phones are simply great with sound quality, I bet any other cell phone company does not provide as good sound quality as sony ericsson does....
coming back to z550i, although its no more avalaible in market but it will always be remembered by its users for the wonderful experineces that they had with it.