At the company's annual shareholders' conference today, RIM CEO Thorsten Heins noted the company's strength in emerging markets with its entry-level BlackBerry 7 devices — the Curve line, for instance — which is a message he has delivered in the last two earnings calls as well. BlackBerry 10 will begin at the high end, though, with just a single full touch and QWERTY model launching around the same time in the calendar first quarter of 2013, so Heins says that the BlackBerry 7 line will continue until BlackBerry 10 has established a "full portfolio" of models. No time frame to get to a full range was given, however.