Try activating your iPhone with AT&T instead of T-Mobile.
Gotta love such helpful comments as that
Anyway, what method of unlocking did you use? And I assume you're on 1.0.2? I'm on T-Mobile and unlocked using the first GUI'd version of iUnlock. I get the bubble whenever I've got voicemail, and it's just like that one with no number. Goes away when I clear my voicemail. I assume you've tried that...
Thanks, that was really helpful.
you should be able to find the .png file for the bubble in the UIkit folder. Just replace it with a blank .png you can make with photoshop . I dont remember the exact directory to get there, but if you have it unshackled it shouldnt take you that long to find it through just looking around.