Whats the difference between a sidekick and a sidekick 3?

Well,you can't say either one of them are good its your opinion ! The difrennce between the sidekick and the sidekick 3 is that the sidekick was the first one that came out which means it hass alott moree glitchess and it dosent even work that well now in dayss ! Sidekick 3 is old but it works very well ! That was the one I last had then I gave it away I got over sidekicks!Sidekick 3 have very rare glitches to find out more information the best website is tmobile.com or go to a tmobile store :-) THANK YOU aND HAVE A NICE DAYY