The Nokia 6233 was introduced in 2005 Q4. The 6233 is a sleek new Triband GSM (900/1800/1900Mhz) handset with 2100Mhz WCDMA support. Mobile-Review reviews the Nokia 6233 and writes, “One of Nokia 6233’s unique features is presence of side stereo-speakers, whose grills are positioned more towards the upper end of the handset. Of course, you might say that it’s not the first time when Nokia embeds stereo-speakers – it actually did that in S40-based handsets earlier, for example in Nokia 7370. But the 6233 is the first phone to feature such big speakerphones (11×15 mm). For the time being not a single manufacturer can offer even somewhat close solutions – over the past few months we saw only Motorola E398, Motorola E1 boasting something similar. The loudspeakers found on Motorola’s products were quite bulky and provided really impressive bass and deep sounding; Nokia 6233 shows off slightly worth quality, but still has some trumps in its sleeve – when it comes to playing back music indoors (not on the street), the 6233 is a powerhouse, offering everything you need. However the handset has a bit less loud overall ring tones volume than other Nokia’s latest proposals like Nokia 6131. The tunes sound better, purer, but quieter. Though the difference is eluding and even might be not noticed, since you will not miss a call anyways. A fact, deserving a special note is that Nokia 6233 easily handles tunes found on Vertu-branded handsets, which is extremely rare nowadays – really, they sound so alike, that sometimes I couldn’t figure out which of the phones is ringing (Vertu offers louder tunes, but when it’s in pocket you won’t hear that).”

CNET reviews the Nokia 6233 and writes about perfomance, “The 6233 performed reliably throughout our extensive use of its core features. While many have been critical of the performance of non-Symbian platform systems in the past, the new software performance of the 6233 Series 40 3rd Edition, while not perfect, was remarkably reliable relative to previous models, particularly when subjected to our finest rapid-fire SMS.”