Battery different. 6670 is BL-5C 900mAh can only use 3 days without shutdown; 3230 is BL-5B 760mAh can only use 2 days without shutdown.
Camera of 3230 is 1.3 million 1 million higher than 6670(actually the former is 123W the latter is 89W, the effect in my opinion is more or less,but someone said effect of 3230 much better and brighter. Whatever! I use 6670).
3230 supports both infrared and FM radio, PTT etc, 6670 is not(infrared is slow; if you do not value the radio, then suggested 6670, but the built-in radio listening to the radio, after all, not money; In addition, the effect of FM radio is good, stereo, but have to plug in headphone (
the best headphones), definitely don not need a Bluetooth headset).
Little difference between the two prices, but configuration 6670 is much better(in Wuhan during May the price short of 300yuan, 3230 there should be little room for price cut,6670 is around 3K, headphone sound quality is by inches) (
big headphones).
There are data line DUK-2 and 64MB memory card with standard 6670, 3230 is 32MB(standard 3230, 64M is enough for calling and sending message, stylish team may have to configure their own large capacity rs-mmc, so it doesn't matter, and data line transmission is very slow, in my opinion 512M is enough, after formatting there is 490M, plus a card reader is perfect. And 3230 can hot swap RS-MMC card, not to switch, it is convenient! 6670 can not, but who often hot swap with nothing to do). From:
buy headphones 
