Ok now this is for all of you deskflipping while trying to add multiple calendars from Google Apps for Business with your iPhone if you connect it using the iOS built in Exchange (not Gmail!) support for syncing.
You’ll find a lot pages stating that you can use:
for that. HOLD YOUR HORSES! – THAT IS NOT ENOUGH!
You have to go to this link WITH YOUR IPHONE (not via desktop!)
select your iOS device (if you have multiple) and AGAIN select the calendars you want to sync. Then go to you iphone settings -> exchange account -> disable calendar -> say “yes” to delete -> enable calendar -> #PROFIT!