Samsung i320n

SlashGear has a review of the Samsung SGH-i320 and writes, “In-call quality was good, and the i320 was tenacious with a signal. Slightly more worrying was the occasional failure to audibly notify me to a new message - either email, SMS or MMS - which I would only notice from the icon when later using up the phone. Ending calls, too, was a confusing affair, as thumbing the “end” button seemingly did not have an immediate effect: the in-call timer continued to count upwards, and I was unsure whether the call had been dropped or if I was still paying for it. … If you’re keen on mobile messaging, particularly push email, and you have small pockets (both in the physical and financial sense) then the i320 might be the phone for you.”

Link. Read more about the Samsung SGH-i320.