i am also an owner of 5510.
i bought the phone back in jan2011.
the problems i read is common to all.
since yesterday i started having the problem of getting 2 message multiple times. its happening only to few messages. random. first i thought its not a problem. and its just server issue but i read here that its a know issue.
is there any fix yet.
secondly i want to install 2.3 on my phone can anyone help?