I just installed this ROM but I still have Sens 2.1. Also, I do not have any Voicemail icon when someone leaves me Verizon voicemail.
this is the norm for any GB ROM at the moment.
stinks, but you get used to it.
easiest way to see if you HAVE a voicemail is to either
1) reboot the phone, notification will pop up
or
2) menu>settings>call> if "clear voicemail notification" is highlighted, you have a voicemail pending. if it's greyed out, you don't have a voicemail.
if you reboot, get a notification, listen to voicemail but the notification won't go away (which is also the norm at the moment), you can get rid of it by doing 1 of 2 things:
1) reboot the phone, the notification will then go away
2) put the phone into 'Hibernate' then exit hibernation mode & it will clear it. this way is much quicker & easier on your battery.
this particular ROM (when i used it) didn't show Sense 3.0 on the System Settings info, it will show 2.1
but it incorporates elements (like the lock screen) of Sense 3.0, so don't worry if you don't see "Sense 3.0" under the System Info/Software Info.