I have 6.1 app do i need to upgrade to 6.5? and need to find a app? Please help

[mm22005]

I have a touch pro by sprint. I am wondering I see they have another upgrade to 6.5 do I really need to upgrade to 6.5 or is 6.1 okay? Operating sys. Also Is there such a program/ app that can take your saved voicemails and forward them to your email account where you can listen to them via email? I want to save my voicemails because after so many days they delete automatically? Thanks for your replies