Cantonese is a totally distinct language, not a dialect. It has its own set of vocabulary and grammar rules. Just for some political reasons, Mandarin call it a "dialect" so the rest of the world would believe there is no loss eliminating it. But the fact is a lot of the Cantonese phrases is linked to the ancient Chinese language thousands year ago. Cantonese is not dying yet. There are still 100M users worldwide. But given the government's power and assistance from the firms, the fate is not far away.
It feels so hurt that Apple is treating Hong Kong people bad for the second time. When they introduced iPad, they left Traditional Chinese unsupported for almost a year, despite the fact that it had already been supported on iPhone (i.e., they were more likely being lazying on porting, rather than having technical difficulties). Hong Kong people love using authentic Apple products a lot. Apple doesn't deserve our love that much but there are not better choices.
Nokia is almost dead; otherwise it would be a better choice. My Nokia phones bought several years ago was already capable reading text messages in Cantonese. Even earlier, when the phones were in dot-matrix monochrome display, Nokia was already supporting Traditional Chinese input and display.
(But don't laugh, Android fanboys. Up to now, most of the Android phones are not yet displaying Traditional Chinese text properly. They just simply plug everything onto a Simplified Chinese fonts. It works basically because it is Unicode, but there are lots of missing dots and misplaced strokes.
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