Sorcerer Questions

[Abraham Z]

100% correct on casting your KNOWN spells.  

One additional note: to use a wand you DO NOT need to have the spell on your KNOWN spells list.  For Example: Mage Armor, Magic Missile, Heightened Awareness and Infernal Healing wands can all be used by a Sorcerer who only has Burning Hands and Vanish as his KNOWN spells.

Further clarification - they have to be on the list of spells your character's class(es) can cast.

Further further clarification - or you have to make a UMD check. For wands that's a flat DC 20 and you can retry unless you roll a 1, so not too difficult for many characters.