Nothing - it has been fine, a real improvement on other Nokia phones I've owned in the past. Battery life not that great though.
Great phone, looks good, easy to use, lots of facilities and has very good PC software for Outlook synchronisation and backing up (a million times better than the awful software that Sony Ericsson ships with its phones).
Quite plain and maybe the battery life could be better, but then it's really good to use and is well designed, so I can't complain and would definitely recommend it to others - can't wait to upgrade to the 6230i, which is even better.
That's right, the problem is the battery. Why don't they use a Li-Polymer type as in the 6310i?
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